Telerik DevCraft Versionen

• Breaking Changes:
  • Angular 19 support has been dropped.
  • Messages: Dynamic messages placeholder syntax has been changed.
  • Multiselect: The SummaryTagDirective has been removed. Use the summaryTagAfter property instead.
  • Scheduler: toolbarViewSelector toolbarWidth is deprecated.
  • Scheduler: toolbarViewSelector responsiveBreakpoint is deprecated.
  • Scheduler: Clicking the more events button now opens a Popover.
  • Scheduler: Major localization messages overhaul.
• Barcodes: Added zoneless support.
• Buttons: Added zoneless support.
• Conversational-UI: indicators and tooltip are now a peer dependency.
• Conversational-UI: Introduced llm kit.
• Excel-export: Added zoneless support.
• Gauges: Added zoneless support.
• Grid: Added grouping display modes.
• Icons: Added support for third-party icon libraries.
• Icons: Added support for variant in icon settings.
• Icons: Added zoneless support.
• Icons: Added component-level icon customization.
• Indicators: Introduced "none" as a possible badge position option.
• Indicators: Added zoneless support.
• Intl: Added zoneless support.
• l10n: Added zoneless support.
• Labels: Added zoneless support.
• Menu: Added zoneless support.
• Multiselect: Added select all functionality.
• Notification: Added zoneless support.
• PDF-export: Added zoneless support.
• Popover: Added popupSettings.
• Popup: Added zoneless support.
• Progressbars: Added zoneless support.
• Ripple: Added zoneless support.
• Scheduler: Component received UX revamp.
• Scheduler: Added responsiveness to Toolbar.
• Scheduler: Added displayMode to ToolbarViewSelector.
• Scheduler: moreEventsClickEvent provides the slot date.
• Scheduler: Added kendoSchedulerRecurrenceSummaryTemplate.
• Scheduler: Added kendoSchedulerRecurrenceButtonTextTemplate.
• Scheduler: Added support for readonly events.
• Scrollview: Added zoneless support.
• Sortable: Added zoneless support.
• Typography: Added zoneless support.
• Utils: Added zoneless support.

• Translated messages with dynamic placeholders resolve to empty string.
• Chart-wizard: Incorrect and missing classes and attributes.
• Chart: Locale is reset when re-rendering.
• Conversational-UI: Incorrect and missing a11y attributes.
• Dateinputs: Incorrect values and missing a11y attributes.
• Datepicker: Inconsistent behavior with dd MMM yyyy format.
• Datepicker: Incorrect format section display in read-only mode.
• Dropdowns: Incorrect values and missing a11y attributes.
• Dropdowns: kendoDropDownFilter directive now works with grouped data.
• Dropdowns: overflow-y is hidden when filtering virtualized data.
• Dropdowns: Preserve caret on Safari space input.
• Dropdowns: Preserve custom combobox text on tab-out.
• Dropdowns: Preserve custom filter text on first multiselect blur.
• Editor: Missing a11y attributes.
• Filter: Incorrect values and missing a11y attributes.
• Gantt: Missing classes and a11y attributes.
• Grid: Non-sortable column headers should not show pointer cursor on hover.
• Grid: Popup closes when anchor leaves viewport vertically on scroll.
• Grid: Updated grouped Grid rendering.
• Inputs, dropdowns, dateinputs: aria-invalid set on form controls before user interaction.
• Inputs: Incorrect values and missing a11y attributes.
• Multiselect: Filter text not preserved on blur using kendoDropDownFilter.
• Pager: Incorrect info and broken navigation when all page size is selected and data is filtered to 0 records.
• Pager: Updated pager element icons.
• Pivotgrid: Incorrect values and missing a11y attributes.
• Scrollview, notification: Custom messages do not update dynamically.
• Spreadsheet: Incorrect values and missing a11y attributes.
• Timepicker: Overscrolls to the last item on iOS in adaptive mode.
• Tooltip: Incorrect a11y attribute for anchor.
• Treelist, grid: PDF export with allPages hangs when data spans multiple pages.
• Treelist: PDF export does not export all pages.
• Treelist: Drag selection fails when end target is unknown.
• WebMCP: Replace navigator modelcontext as it is deprecated.

• Common:
  • LLM Response Primitives.
  • Scheduler Redesign - Demos/Docs Update.
  • jQuery Upgrade tool.
  • Added kendoKeydown event for components with keyboard navigation.
• Dependencies:
  • Fluent Theme Package (v14.5.0).
  • Classic Theme Package (v14.5.0).
  • Bootstrap Theme Package (v14.5.0).
  • Default Theme Package (v14.5.0).
  • Material Theme Package (v14.5.0).
• Drawer:
  • Improved developer experience of the Drawer component.
• Editor:
  • Changing fontName or fontSize scrolls Inline Editor's content to the top.
  • Formatting marks not displayed for class initialized inline editors.
• Grid:
  • Add k-sortable to Grid sortable columns.
  • Editor Navigation Prevented with Stacked DataLayoutMode Grid.
• MultiSelect:
  • [Breaking Change] SelectAll option for MultiSelect.
• Scheduler:
  • Readonly Events.
  • Breaking Changes:
    • Apply new table header rendering.
    • Redesigned Desktop Recurrence Editor.
    • Introduced "More Events" Popover in Month and Year views.
    • Responsive Desktop Events.
    • Redesigned Add/Edit dialogs.
    • Improved Scheduler Responsive Desktop Toolbar.
    • Scheduler redesign.
• SegmentedControl:
  • SegmentedControl Left and Right Arrow keyboard navigation support.

• ColorPicker:
  • kendo.parseColor throws on oklch parse attempt.
  • Error is thrown after destroy in ColorPicker.
• ContextMenu:
  • Unable to open ContextMenu of scrollable Grid.
• DateInput:
  • Unable to search/input selected months by typing first few letters in DatePicker.
• DatePicker:
  • Unable to search/input selected months by typing first few letters in DatePicker.
• DropDownTree:
  • Unexpected tokens in DropDownTree with checkboxes after dataSource read.
• Editor:
  • Kendo Inline Editor adds linebreak after typing first character in Firefox.
  • Read-Only Editor clears pasted text, instead of not allowing paste at all.
  • Cannot read properties of undefined (reading '_destroyResizeHandles').
  • Dangerous Regex in the Editor's paste functionality.
  • Change event is fired when Inline Editor bound to Model.
• Filter:
  • Missing kendo.binder dependency of Filter.
• Gantt:
  • View type disappears with different width.
• Grid:
  • Unable to open ContextMenu of scrollable Grid.
  • Editing in stacked layout Grid with detailedTemplate throws an error.
  • A row cannot be placed at last position in Grid with reorderable row enabled.
  • Tabbing on a Grid with locked column does not focus the next input.
  • Unable to localize Action Buttons of Adaptive Grid.
  • Incorrect recalculation of column widths in footer cells in the Kendo Grid component after resizing columns.
• ListBox:
  • ListBox setOptions does not allow setting multiple selectable items.
• MultiSelect:
  • MultiSelect - removing selected tag does not grab focus.
• NumericTextBox:
  • NumericTextBox rejects valid decimal values.
• Scheduler:
  • Scheduler calendar is not oriented correctly out of the box when direction of the wrapper is set to RTL.
  • Timeline view with RTL does not render the events correctly after dragging.
  • Class 'k-focus' is occasionally not cleared when changing views.
  • In selectable RTL Scheduler timeline jumps on clicking a timeslot.
• Spreadsheet:
  • Spreadsheet columns cannot be resized.
  • Custom editor popup in spreadsheet closes immediately after opening.
  • Event handlers execution from clipboard paste in spreadsheet.
  • Applying freeze panes in Spreadsheet after scrolling resets scroll position and prevents navigation.
• Window:
  • Window's containment with height as percent can break resizing.

• Barcode: Added component.
• Grid: Added k-sortable class to sortable columns and removed cursor override.
• PDF-viewer: Added component.

• Editor: Bumped @progress/kendo-editor-common in /packages/editor.
• Grid: Fixed cells.data custom components not rendering.

• Badge: Added static position.
• Barcode: Converted Barcode and QRCode to functional components.
• Colorpallete: Exposed ariaLabel prop.
• Dateinputs: Added ariaLabel prop to TimePicker and DateTimePicker.
• Flatcolorpicker: Exposed configuration options for the palette and gradient views.
• Grid: Added grouping modes with customization and stacked layout support.
• Grid: Add k-sortable class to sortable columns.
• Conversational-UI: Implemented llm kit components.
• Maskedtextbox: Added aria label prop.
• Multiselect: Added select all functionality.
• Scheduler: Show hidden events in a popover when clicking "more events" button.
• Scheduler: Exposed svgIcon prop on the SchedulerResource interface.
• Scheduler: Improved event rendering and support readonly events.
• Scheduler: Modernized toolbar and optimized responsive layout.
• Scheduler: Redesigned create/edit form layout and flows, expose recurrence summary templates.
• Scheduler: Split DateHeaderCell for day/week views.
• Treeview: Migrated TreeView to functional component.
• Upload: Converted component to functional one.

• PDF-viewer: Bumped @progress/kendo-pdfviewer-common.
• Dateinputs: React memo comparison function crashes in React 19 production builds.
• Editor: Apply aria-label, aria-labelledby, and aria-describedby to contenteditable element in iframe mode.
• Inputs, dateinputs: Prevent default aria-label from overriding external label associations.
• Inputs: Removed default aria-label values since they override label for associations.
• Labels: Apply disabled styles when editorDisabled prop is set.
• Numerictextbox: Resolved issue with RTL positioning.
• Panelbar: Respect expanded prop when children arrive asynchronously.
• Scheduler: Adjust exception dates when series start changes in form-based edit.
• Scheduler: Correct series editing when drag/drop or resize is applied to an occurrence.
• Scheduler: Events misaligned in adaptive mode.
• Treelist: Convert component to functional one.
• Treelist: Fixed keyboard navigation lifecycle timing in functional component.
• Treelist: Prevent column resize flickering and width mismatch in scrollable layout.
• Treelist: Prevent text selection of other rows during drag and drop.
• Treelist: Split header and body into separate scrollable containers.
• Treeview: Preserve expand/collapse animation for expandable nodes.
• Upload: Assign unique uid per file in batch mode.
• Upload: Hide progressbar internal label.
• Upload: Prevent image preview flashing in events demo.
• Upload: Show video icon for mp4 files.
• WebMCP: Replace navigator model context as it is deprecated.

• Runtime License information is now displayed in Debug View.
• Added an API for resetting mock arrangements and clearing invocation counters for a specific mock object.
• Added support for .NET 11 Preview 7.

• Fixed an issue that prevented unit tests from running in Visual Studio Test Explorer for Microsoft.Testing.Platform-based projects when the JustMock Visual Studio extension was enabled.
• Resolved an issue causing InvalidProgramException failures in certain complex test methods on .NET 9 and newer.

• Report Server for .NET now includes an MCP Server for AI-native administration:
  • Telerik Report Server for .NET now includes a built-in MCP Server that exposes report management and a wide range of other administrative operations, such as users, permissions, data connections, and scheduled tasks, as MCP tools authenticated via Personal Access Tokens.
• Report Server for .NET now offers a new version of its REST API:
  • Report Server for .NET now offers a new version of its REST API, with more consistent responses and error handling across all endpoints.
• Reporting NuGet packages are now published to the public NuGet Gallery:
  • Telerik Reporting NuGet packages are now available on the public NuGet Gallery (nuget.org), in addition to the Telerik private feed. This makes it easier to reference and restore Reporting packages in projects and CI pipelines that use the public gallery by default.
• JSON Report Definition Format for Reports:
  • Telerik Reporting now supports a new JSON-based report definition file format alongside the existing XML formats. It's easy to read and edit by hand or with AI coding assistants, produces clean version-control diffs, and can be validated in CI pipelines using a published JSON Schema.
• Reporting now supports Aztec barcode encoding and rendering:
  • Telerik Reporting now supports Aztec barcode encoding and rendering, adding another 2D barcode symbology you can use in your reports.
• What's Improved:
  • Excel document generation is now faster, thanks to optimized internal data structures.
  • Report Server personal access tokens now support a Report Server API scope, in addition to the existing Report Viewer scope.
  • Collection Editors in desktop report designers now provide copy-paste functionality for their contents.
  • The Standalone Report Designer now uses Unicode-aware (UAX#29) word selection when double-clicking in text fields.
  • The Web Report Designer now allows copying the sample snippets shown for functions.
  • The HTML5 Report Viewer's Report Preview Insights prompt now supports voice input via a microphone button.
  • Report Server for .NET now offers an HttpClient library distributed as a NuGet package.
  • The Standalone Report Designer now supports rearranging opened report tabs by dragging them.
  • The Logarithmic scale of the Graph item now provides MajorStep and LabelStep properties for improved customization and readability.

• XML Configuration:
  • An assembly with a partial 'version' value is rejected as untrusted in the 'assemblyReferences' element.
• Crystal Reports Converter:
  • Parameter Fields are not converted to Report Parameters.
  • Suppression formulas are not converted to a visibility expression.
• Desktop Designer:
  • The Import Code File Wizard shows a warning when using a non-English locale despite build succeeding.
  • Double-clicking a word in the expression editor does not select the correct word boundaries.
• Web Designer:
  • A 404 console error occurs for a missing jQuery.UI icon.
  • Font icons CSS is incompatible with the latest @progress/kendo-font-icons version.
  • The WebServiceDataSource authentication selector fails to render when using non-English string resources.
• Processing:
  • A serialization exception is thrown when setting the NoDataStyle BackgroundImage of data items and PictureBox.
  • HtmlTextBox does not preserve non-breaking space behavior between sibling inline elements.
• Rendering:
  • Graph labels and legends are not aligned when using the Skia rendering engine.
• PDF Rendering:
  • PDF export can incorrectly merge or duplicate distinct images that share pixel dimensions and similar content.
• Word Rendering:
  • A bullet list item that spans two pages gets a duplicate bullet.
  • A numbered list that spans two pages restarts numbering at (1).
• Server Manager:
  • Favoriting a report fails for users with the "Report Reader" role.

• AI Report Generator: Table and Crosstab Support in the Web Report Designer:
  • The AI Report Generator in the Web Report Designer can now create and edit Table, Crosstab, and List items from a plain-language description - automatically wiring up groups, aggregates, and layout. An inline "Undo Changes" option lets you revert the AI's changes with a single click.
• Kendo theming compatibility and custom themes support in Web Report Designer:
  • The Web Report Designer now supports native Kendo UI theming, including custom themes created with ThemeBuilder. Applications built on Kendo UI can apply their existing theme to the designer, giving a consistent look across the app and the reporting experience.
• JSON Report Definition Format for Reports:
  • Telerik Reporting now supports a new JSON-based report definition file format alongside the existing XML formats. It's easy to read and edit by hand or with AI coding assistants, produces clean version-control diffs, and can be validated in CI pipelines using a published JSON Schema.
• Reporting NuGet packages are now published to the public NuGet Gallery:
  • Telerik Reporting NuGet packages are now available on the public NuGet Gallery (nuget.org), in addition to the Telerik private feed. This makes it easier to reference and restore Reporting packages in projects and CI pipelines that use the public gallery by default.
• Reporting now supports Aztec barcode encoding and rendering:
  • Telerik Reporting now supports Aztec barcode encoding and rendering, adding another 2D barcode symbology you can use in your reports.
• What's Improved:
  • Excel document generation is now faster, thanks to optimized internal data structures.
  • Collection Editors in desktop report designers now provide copy-paste functionality for their contents.
  • The Standalone Report Designer now uses Unicode-aware (UAX#29) word selection when double-clicking in text fields.
  • The Web Report Designer now allows copying the sample snippets shown for functions.
  • RedisStorage now accepts the IConnectionMultiplexer interface for easier dependency injection and unit testing.
  • The HTML5 Report Viewer's Report Preview Insights prompt now supports voice input via a microphone button.
  • The Standalone Report Designer now supports rearranging opened report tabs by dragging them.
  • Standalone Report Designer for .NET now renders report previews with vector graphics for higher quality when using the Skia engine.
  • The Logarithmic scale of the Graph item now provides MajorStep and LabelStep properties for improved customization and readability.

• XML Configuration:
  • An assembly with a partial 'version' value is rejected as untrusted in the 'assemblyReferences' element.
• Crystal Reports Converter:
  • Parameter Fields are not converted to Report Parameters.
  • Suppression formulas are not converted to a visibility expression.
• Standalone Report Designer:
  • The Import Code File Wizard shows a warning when using a non-English locale despite build succeeding.
  • Double-clicking a word in the expression editor does not select the correct word boundaries.
• Standalone Report Designer for .NET 8 and above:
  • Coded reports fail to load assemblies when built from an ASP.NET Core web project.
• Web Designer:
  • A 404 console error occurs for a missing jQuery.UI icon.
  • Font icons CSS is incompatible with the latest @progress/kendo-font-icons version.
  • The WebServiceDataSource authentication selector fails to render when using non-English string resources.
• Deployment:
  • The source code distributed to clients is not buildable out-of-the-box.
• Installation:
  • An incorrect version of the Telerik.Windows assemblies is included in the Telerik Reporting 2026 Q2 installation.
• Processing:
  • A serialization exception is thrown when setting the NoDataStyle BackgroundImage of data items and PictureBox.
  • HtmlTextBox does not preserve non-breaking space behavior between sibling inline elements.
• Rendering:
  • Graph labels and legends are not aligned when using the Skia rendering engine.
• PDF Rendering:
  • PDF export can incorrectly merge or duplicate distinct images that share pixel dimensions and similar content.
• Word Rendering:
  • A bullet list item that spans two pages gets a duplicate bullet.
  • A numbered list that spans two pages restarts numbering at (1).
• Native Angular Report Viewer:
  • The Navigate Backward button becomes enabled after clicking Refresh on a report with DateTime parameters, despite no navigation occurring.
  • Report history navigation fails when going back more than one step.
• React Report Viewer:
  • External command buttons throw a TypeError.
• Windows Forms Report Viewer:
  • A gray area and "Preview" button are shown when ReportSource is null.

• What's New:
  • Added support for .NET 11 MAUI (preview 6).
  • Added a new Chart (preview) - modern, SkiaSharp-powered, high performance chart control with support for Bar, Line, Area, Point, Pie, and nested Donut series, and multiple plot areas.
  • Added CircularSlider. A flexible UI component that lets users adjust values by rotating a handle along a circular path.
  • All Telerik Document Processing namespaces are renamed from Telerik.Windows.Documents.* to Telerik.Documents.*. The assembly names are not changed, so update only the using directives and the XAML clr-namespace mappings in your applications. This affects the PdfViewer control and the PdfProcessing, WordsProcessing and SpreadProcessing libraries.
• Dependencies:
  • Telerik Document Processing Library (DPL) version is updated from 2026.2.707 to 2026.3.810.
• AutoComplete:
  • Introduced the SuggestionViewWidth property to specify the width of the SuggestionView.
• CollectionView:
  • Provide a single deselect option when tapping the selected item again to be deselected. The selected item can be selected/deselected via the Space key on desktop.
• Common:
  • [WinUI] Improved the keyboard focus outline for RadTemplatedButton and related button controls by centralizing focus-border styling. The focus outline can now be customized directly from a control's Style using the FocusBorderUtils.HasFocusBorder, FocusBorderUtils.BorderBrush, FocusBorderUtils.BorderThickness, and FocusBorderUtils.Margin attached properties. These properties provide control over the focus border's visibility, color, thickness, and offset.
• DatePicker:
  • [MacCatalyst] [WinUI] Added keyboard navigation for DatePicker, including spinner navigation (Tab/Shift+Tab, Left/Right), spinner value changes (Up/Down), open/select (Enter/Space), close (Escape), and clear (Delete/Backspace).
• DateTimePicker:
  • [MacCatalyst] [WinUI] Added keyboard navigation for DateTimePicker, including spinner navigation (Tab/Shift+Tab, Left/Right), spinner value changes (Up/Down), open/select (Enter/Space), close (Escape), and clear (Delete/Backspace).
• ListPicker:
  • [MacCatalyst] [WinUI] Added keyboard navigation for ListPicker, including spinner value changes (Up/Down), open/select (Enter/Space), close (Escape), and clear (Delete/Backspace).
• TabView:
  • [MacCatalyst] [WinUI] Added keyboard navigation for TabView, including tab navigation (Arrow keys) and selection (Enter/Space).
• TemplatedPicker:
  • [MacCatalyst] [WinUI] Added keyboard navigation for TemplatedPicker, including open/select (Enter/Space), close (Escape), and clear (Delete/Backspace).
• TimePicker:
  • [MacCatalyst] [WinUI] Added keyboard navigation for TimePicker, including spinner navigation (Tab/Shift+Tab, Left/Right), spinner value changes (Up/Down), open/select (Enter/Space), close (Escape), and clear (Delete/Backspace).
• TimeSpanPicker:
  • [MacCatalyst] [WinUI] Added keyboard navigation for TimeSpanPicker, including spinner navigation (Tab/Shift+Tab, Left/Right), spinner value changes (Up/Down), open/select (Enter/Space), close (Escape), and clear (Delete/Backspace).

• AutoComplete:
  • [WinUI] [MacCatalyst] Cursor position changes to end when trying to edit text in different location than end and using TextTransform Uppercase.
• DataGrid:
  • Cannot tab to unfocus the control when reaching the last cell.

• Common:
  • Added the Telerik.Web.UI.FileBrowserAllowedPaths web.config setting to restrict the folders accessible to RadEditor and RadFileExplorer's file browser dialogs.
  • Added the Telerik.PersistenceFramework.AllowedCustomTypes web.config setting to allow custom types used with the Persistence Framework (e.g. RadDock, RadGrid, RadPivotGrid state persistence).
  • Added the Telerik.Web.UI.AllowedCustomDialogTypes web.config setting to allow custom dialog types used with RadEditor dialogs during deserialization.
  • The Telerik.Upload.AllowedCustomMetaDataTypes, Telerik.Web.UI.AllowedCustomDialogTypes, and Telerik.PersistenceFramework.AllowedCustomTypes web.config settings now accept fully-qualified assembly names (FQAN), improving custom type resolution in Web Forms Site projects compiled on the fly.
• Dependencies:
  • Telerik.Licensing version (1.9.1).
  • Telerik.Spreadsheet.Web version (1.2.0).
  • Telerik Document Processing Library (DPL) version (2026.3.810).
• Chart (obsolete):
  • [Breaking Change] RadChart has been removed from the Telerik.Web.UI assembly. Applications that reference RadChart or its related classes must migrate to RadHtmlChart.
• Spreadsheet:
  • [Breaking Change] The RadSpreadsheet dependency assembly has been renamed from Telerik.Web.Spreadsheet to Telerik.Spreadsheet.Web. Update project references accordingly. Telerik.Spreadsheet.Web is now publicly available as a separate package on NuGet and must be added explicitly.

• Security:
  • Ongoing security improvements.
• Common:
  • Watermarks no longer appear on valid trial licenses.
• AsyncUpload:
  • e.UploadResult in the FileUploadEvent throws InvalidOperationException: This type is not allowed.
  • Disabling session state and csrf causes null reference exception when using async upload.
• MonthYearPicker:
  • RadMonthYearPicker is not rendered correctly when RenderMode is set to Lightweight in the web.config and TodayButtonCaption is defined.
• Panelbar:
  • Accesskey on items not focusing them in PanelBar control.
• PersistenceFramework:
  • Error: System.InvalidOperationException: This type is not allowed.
• Spreadsheet:
  • A JavaScript error is thrown when typing a font size that is not presented in the dropdown.

• Common:
  • Added .NET 11 Preview 6 compatibility.
  • LLM Response Primitives.
  • jQuery Upgrade tool.
  • Added kendoKeydown event for components with keyboard navigation.
• Dependencies:
  • Telerik Document Processing Library (DPL) version (2026.3.810).
  • Fluent Theme Package (v14.5.0).
  • Classic Theme Package (v14.5.0).
  • Bootstrap Theme Package (v14.5.0).
  • Default Theme Package (v14.5.0).
  • Material Theme Package (v14.5.0).
• Drawer:
  • Improved developer experience of the Drawer component.
• Editor:
  • Changing fontName or fontSize scrolls Inline Editor's content to the top.
  • Formatting marks not displayed for class initialized inline editors.
• Grid:
  • Add k-sortable to Grid sortable columns.
  • Editor navigation prevented with stacked DataLayoutMode grid.
  • Grid Messages.Commands options are missing.
• MultiSelect:
  • SelectAll option for MultiSelect.
• Scheduler:
  • Readonly Events.
  • Breaking Changes:
    • Apply new table header rendering.
    • Redesigned Desktop Recurrence Editor.
    • Introduced "More Events" Popover in Month and Year views.
    • Responsive Desktop Events.
    • Redesigned Add/Edit dialogs.
    • Improved Scheduler Responsive Desktop Toolbar.
    • Scheduler redesigned.
• SegmentedControl:
  • SegmentedControl Left and Right Arrow keyboard navigation support.

• ColorPicker:
  • kendo.parseColor throws on oklch parse attempt.
  • Error is thrown after destroy in ColorPicker.
• ContextMenu:
  • Unable to open ContextMenu of scrollable Grid.
• DateInput:
  • Unable to search/input selected months by typing first few letters in DatePicker.
• DatePicker:
  • Unable to search/input selected months by typing first few letters in DatePicker.
• DropDownTree:
  • Unexpected tokens in DropDownTree with checkboxes after dataSource read.
• Editor:
  • Kendo Inline Editor adds linebreak after typing first character in Firefox.
  • Read-Only Editor clears pasted text, instead of not allowing paste at all.
  • Cannot read properties of undefined (reading '_destroyResizeHandles').
  • Dangerous Regex in the Editor's paste functionality.
  • Change event is fired when Inline Editor bound to Model.
• Filter:
  • Missing kendo.binder dependency of Filter.
• Gantt:
  • View type disappears with different width.
• Grid:
  • Unable to open ContextMenu of scrollable Grid.
  • Editing in stacked layout Grid wtih detailedTemplate throws an error.
  • A row cannot be placed at last position in Grid with reorderable row enabled.
  • Tabbing on a Grid with locked column does not focus the next input.
  • Unable to localize Action Buttons of Adaptive Grid.
  • Incorrect recalculation of column widths in footer cells in the Kendo Grid component after resizing columns.
• ListBox:
  • ListBox setOptions does not allow setting multiple selectable items.
• MultiSelect:
  • MultiSelect - removing selected tag does not grab focus.
• NumericTextBox:
  • NumericTextBox rejects valid decimal values.
• Scheduler:
  • Scheduler calendar is not oriented correctly out of the box when direction of the wrapper is set to RTL.
  • Timeline view with RTL does not render the events correctly after dragging.
  • Class 'k-focus' is occasionally not cleared when changing views.
  • In selectable RTL Scheduler timeline jumps on clicking a timeslot.
• Spreadsheet:
  • Spreadsheet columns cannot be resized.
  • Custom editor popup in spreadsheet closes immediately after opening.
  • Event handlers execution from clipboard paste in spreadsheet.
  • Applying freeze panes in Spreadsheet after scrolling resets scroll position and prevents navigation.
• Window:
  • Window's containment with height as percent can break resizing.

• Common:
  • LLM Response Primitives.
  • Scheduler Redesign - Demos/Docs Update.
  • jQuery Upgrade tool.
  • Added kendoKeydown event for components with keyboard navigation.
• Dependencies:
  • Telerik Document Processing Library (DPL) version (2026.3.810).
  • Fluent Theme Package (v14.5.0).
  • Classic Theme Package (v14.5.0).
  • Bootstrap Theme Package (v14.5.0).
  • Default Theme Package (v14.5.0).
  • Material Theme Package (v14.5.0).
• Drawer:
  • Improved developer experience of the Drawer component.
• Editor:
  • Changing fontName or fontSize scrolls Inline Editor's content to the top.
  • Formatting marks not displayed for class initialized inline editors.
• Grid:
  • Add k-sortable to Grid sortable columns.
  • Editor navigation prevented with stacked DataLayoutMode grid.
  • Grid Messages.Commands options are missing.
• MultiSelect:
  • SelectAll option for MultiSelect.
• Scheduler:
  • Readonly Events.
  • Breaking Changes:
    • Apply new table header rendering.
    • Redesigned Desktop Recurrence Editor.
    • Introduced "More Events" Popover in Month and Year views.
    • Responsive Desktop Events.
    • Redesigned Add/Edit dialogs.
    • Improved Scheduler Responsive Desktop Toolbar.
    • Scheduler redesigned.
• SegmentedControl:
  • SegmentedControl Left and Right Arrow keyboard navigation support.

• ColorPicker:
  • kendo.parseColor throws on oklch parse attempt.
  • Error is thrown after destroy in ColorPicker.
• ContextMenu:
  • Unable to open ContextMenu of scrollable Grid.
• DateInput:
  • Unable to search/input selected months by typing first few letters in DatePicker.
• DatePicker:
  • Unable to search/input selected months by typing first few letters in DatePicker.
• DropDownTree:
  • Unexpected tokens in DropDownTree with checkboxes after dataSource read.
• Editor:
  • Kendo Inline Editor adds linebreak after typing first character in Firefox.
  • Read-Only Editor clears pasted text, instead of not allowing paste at all.
  • Cannot read properties of undefined (reading '_destroyResizeHandles').
  • Dangerous Regex in the Editor's paste functionality.
  • Change event is fired when Inline Editor bound to Model.
• Filter:
  • Missing kendo.binder dependency of Filter.
• Gantt:
  • View type disappears with different width.
• Grid:
  • Unable to open ContextMenu of scrollable Grid.
  • Editing in stacked layout Grid wtih detailedTemplate throws an error.
  • A row cannot be placed at last position in Grid with reorderable row enabled.
  • Tabbing on a Grid with locked column does not focus the next input.
  • Unable to localize Action Buttons of Adaptive Grid.
  • Incorrect recalculation of column widths in footer cells in the Kendo Grid component after resizing columns.
• ListBox:
  • ListBox setOptions does not allow setting multiple selectable items.
• MultiSelect:
  • MultiSelect - removing selected tag does not grab focus.
• NumericTextBox:
  • NumericTextBox rejects valid decimal values.
• Scheduler:
  • Scheduler calendar is not oriented correctly out of the box when direction of the wrapper is set to RTL.
  • Timeline view with RTL does not render the events correctly after dragging.
  • Class 'k-focus' is occasionally not cleared when changing views.
  • In selectable RTL Scheduler timeline jumps on clicking a timeslot.
• Spreadsheet:
  • Spreadsheet columns cannot be resized.
  • Custom editor popup in spreadsheet closes immediately after opening.
  • Event handlers execution from clipboard paste in spreadsheet.
  • Applying freeze panes in Spreadsheet after scrolling resets scroll position and prevents navigation.
• Window:
  • Window's containment with height as percent can break resizing.

• Common:
  • Chain Of Thought component.
  • Tool Call component.
  • Checkpoint component.
  • Citation component.
  • Reasoning component.
  • Compatibility with .NET 11 Preview 7.
  • Added new trial banners.
• Breaking Changes:
  • Unsafe template syntax for dataviz components is removed, use JS functions instead. This affects components like Chart, StockChart, Map, Diagram, Gauges, etc.
• Dependencies:
  • Added support for Bootstrap theme version 14.5.0.
  • Added support for Classic theme version 14.5.0.
  • Added support for Default theme version 14.5.0.
  • Added support for Fluent theme version 14.5.0.
  • Added support for Material theme version 14.5.0.
  • Added support for Meridian theme version 14.5.0.
• Diagram:
  • Allow rich text content for shapes and connections.
• FileSelect:
  • Improved file read performance.
• Scheduler:
  • Added confirmation dialog when removing recurrence.
  • Added popover opening upon more events button click to preview the events before changing the view.
  • New adaptive appointment rendering.
  • Redesigned and changed layout of the editing form and recurrence editor.
  • Added readonly state for the appointments.
  • New enhanced 'more events' button rendering.
  • Replaced compact view tool native select with telerik dropdown menu button.
  • New compact mode for tools and adaptive toolbar behavior.
  • Added 'add new event' tool.

• DropDownList:
  • FieldIdentifier is set only on initialization.
• Examples:
  • Normalize ThemeConfigurator theme path handling.
• ExpansionPanel:
  • Prevent page scroll when toggling with space key.
• FileManager:
  • SelectedItemsChanged is triggered when ListView is active.
• Grid:
  • Unlocking a column from the column menu does not work.
  • Add k-sortable class to the header cell if the column is sortable.
  • Virtual scrolling does not work with no data template.
  • SearchBox may skip typed characters randomly.
• PivotGrid:
  • Horizontontal scrolling resets vertical scrollbar.
• Popup:
  • OnHide does not fire on outside click after programmatic Hide.
• PromptBox:
  • Recalculate auto-mode textarea height after multiline state update on paste.
  • OnPromptAction does not fire after runtime Mode change.
• Scheduler:
  • Agenda view exception on runtime grouping removal.
  • Render correctly empty time span and midnight events.
  • Use invariant CSS numeric formatting for Timeline culture regression.
• TabStrip:
  • Pinned tabs should be first when set in onstateinit.
  • Overflow menu button should be initially enabled when tabs are overflowing and is rendered inside template.
• Taskboard:
  • Prevent TaskBoard rendering failure caused by missing localization service.
• TreeView:
  • OnItemContextMenu fires for all parent items.

• What's new:
  • Smart features in RadGridView.
  • New Smart-Paste Button component.
  • Spreadsheet AI tools capabilities.
  • NuGet packages are now also uploaded to NuGet.org.
• Common:
  • Changed:
    • The Bin80 and Bin90 folders are removed from the installation folder.
    • Telerik is added as a prefix to all NuGet packages.
  • Breaking Changes:
    • The UI.for.WinForms.AllControls.Net80/Net90/Net462/Net48 packages are no longer produced. Use the Telerik.UI.for.WinForms.AllControls NuGet package.
  • Dependencies:
    • Telerik Document Processing Library (DPL) version updated to 2026.3.810.
    • Minimum required Telerik Licensing version updated to 1.9.1.
• RadAIPrompt:
  • Added LocalizationProvider.
• RadChat:
  • Multiple improvements related to layout, multiline support, localization, styling and extensibility.
• RadDock:
  • Provided an option to control item ordering in QuickNavigator.
• RadGridView:
  • Added Smart Grid features in RadGridView.
• RadMap:
  • Microsoft has retired Bing Maps and all Bing Maps provider-related classes have been marked as obsolete.
• RadSpreadsheet:
  • Introduced smart assistant that uses Document Processing AI Agent Tools.
• Buttons:
  • RadSmartPasteButton is an AI-powered component that streamlines data entry by extracting structured information from clipboard content and automatically populating form fields.
• RadProgressBar:
  • Improved accessibility and testing capabilities by implementing UI Automation.

• Installation:
  • The Examples project inside the installation folder is unloaded inside Visual Studio.
• RadDropDownList:
  • Click event does not fire on the arrow button.
• RadForm:
  • RadForm: Exception thrown in RadFormUIAutomationProvider.
• RadRichTextEditor:
  • Duplicated default ListItem entry in the DropDownList content form on XAML import.
• RadSpinEditor:
  • Up and down buttons do not set the value to Maximum and Minimum when RightMouseButtonReset=true.
• RadScreenTip:
  • The control is not scaled correctly on HDPI.
• Buttons:
  • Setting CheckState to Indeterminate is lost when the form is opened again at design time.

• What's New:
  • RadSmartPasteButton is an AI-powered component that streamlines data entry by extracting structured information from clipboard content and automatically populating form fields.
  • Telerik UI for WPF NuGet packages are now published on NuGet.org for easier discovery and consumption.
  • Introduced RadInlineAIAssistant component - a floating, popup-based control that attaches to a text control, such as a TextBox or a RadRichTextBox, and provides inline AI-powered text editing capabilities.
  • Telerik.CLI now supports Telerik UI for WPF breaking-change detection across C#, VB.NET, and XAML.
  • Telerik.WPF.MCP is updated with a project upgrade tool that detects breaking API changes when upgrading Telerik UI for WPF versions.
• Common:
  • Changed:
    • Removed Telerik.Windows.MediaFoundation and MediaFoundation NuGet packages. Their binaries are now in the Telerik.Windows.Controls.Media NuGet.
  • Dependencies:
    • Minimum required Telerik Licensing version updated to 1.9.1.
    • Telerik Document Processing Library (DPL) version updated to 2026.3.810.
• PropertyGrid:
  • Added a mechanism to customize the label content (display name) of the property field.
• Spreadsheet:
  • Introduced smart assistant that uses Document processing agent tools.

• Chat:
  • Fixed binding errors for RadGlyph inside RadPromptInput / RadDropDownPopup (Cannot find source for binding with RelativeSource FindAncestor).
• Docking:
  • Panes are disappearing when the Docking is in Deferred mode.
  • Unpinning an active pane from a group causes the next pane to not be displayed correctly when the PaneActivationMode is set to Previous.
• FileDialogs:
  • Entering local path in breadcrumb while network path is loading does not switch to the local path.
• FilePathPicker:
  • DialogClosed event is not raised after the DialogType property gets changed.
• GridView:
  • Degraded performance in applications published as clickonce.
• PDF Viewer:
  • PDF Signature(image) is displayed on the incorrect location when using annotations.
• RichTextBox:
  • Duplicated default ListItem entry in the DropDownList content form on XAML import.
  • Underline color reset to black after export using RtfFormatProvider.
  • Keyboard commands (arrow keys, backspace, etc.) are not working for input controls hosted inside InlineUIContainer.
  • NullReferenceException when importing docx document containing simple field without run in it.
• Spreadsheet:
  • Wrong translations are present for some of the resource keys for the German language.
  • Incompatibility with Microsoft Excel of in-document Hyperlinks referencing worksheets with name containing spaces.
  • Save command doesn't commit the value of the currently edited cell before saving.
  • Value is clipped or visualized out of the cell boundaries when the cell value is updated while it is in an inactive worksheet, and is referenced by another cell from the active sheet.
  • Workbook property binding is failing when used in a DataTemplate.

• Updated the Telerik Licensing minimal required version to 1.9.1.

• What's New:
  • Added support for Array Formulas in SpreadProcessing.
  • Introduced .NET 10-targeted assemblies in the package distribution and updated the NuGet package manifest to include .NET 10 as a supported target framework.
• Breaking Changes:
  • Updated namespaces to remove platform-specific ("Windows") references, providing a cleaner, fully platform-agnostic API aligned with cross-platform .NET development.
• Dependencies:
  • Updated Telerik Licensing minimal required version to 1.9.0.

• PdfProcessing:
  • Corrupted character spacing when exporting PDF/A document with embedded subset fonts.
  • Slow performance when opening a document containing many Path geometries in the content stream.
• SpreadProcessing:
  • ArgumentNullException when importing a document with a conditional formatting rule with no borders.
  • ArgumentNullException: 'Value cannot be null. Parameter name: key' when importing a document with null RadExpression entries.
  • Setting values of cells referred from formulas causes performance issues due to memory leak.
• WordsProcessing:
  • Cannot properly import a document that has duplicating xml definitions in the original and glossary documents.
  • Converting table with custom borders to PDF does not work.
  • LineInfo objects are not cleared when there are tables in the document being exported to PDF which leads to OutOfMemoryException.
• ZipLibrary:
  • Reading password-protected archive with wrong password throws generic exception.

• PdfProcessing:
  • Introduced a consistent API for cloning document elements.
  • Introduced support of Keywords entry in the document information dictionary (RadFixedDocumentInfo).
  • Added the ability to handle documents with missing filed type FT.
  • Handled import of documents containing an invalid PDF object dictionary key.
  • Implemented import of inline images with Indexed Color Space.
  • Added the ability to import TrueType font with FontFamily when there is no available embedded FontFile for NetStandard.
• WordsProcessing:
  • Implemented support for Text Frame Properties.
  • Added support for horizontal line.

• WordsProcessing:
  • RtfFormatProvider: Floating image with position relative to the page and anchor inside a paragraph with text frame properties is offset by the position of the paragraph frame.
  • Fixed issue where NullReferenceException is thrown when importing a document with invalid nesting inside.
  • Fixed issue where ArgumentNullException is thrown when exporting table border without specified border color to PDF.

• Inputs: Implemented OTPInput component.

• Dialogs: Fixed issue regarding passing native event directly in dispatchMoveEvent.
• Grid: Fixed to prevent attribute fallthrough in table components.
• Layout: Fixed issue so that drawer opens from the correct direction on first expansion.

• Common:
  • Added Expansion Panel.
  • Added compatibility with .NET 11 Preview 6.
• Dependencies:
  • Added support for Bootstrap theme version 14.3.0.
  • Added support for Classic theme version 14.3.0.
  • Added support for Default theme version 14.3.0.
  • Added support for Fluent theme version 14.3.0.
  • Added support for Material theme version 14.3.0.
  • Added support for Meridian theme version 14.3.0.
• Chart:
  • Added Justified parameter to CategoryAxis.
• ContextMenu:
  • Added ContextMenu keyboard customizations.
• Filter:
  • Added the ability to filter dropdown fields.
• MultiSelect:
  • Tag mode is enabled by default with 10 max allowed tags.
  • Added select all option.
• Popup:
  • Added close on outside click.
• RadioGroup:
  • Added DisabledField support for per-item disabled state.
• SplitButton:
  • Added Open/Close API methods.
• StockChart:
  • Added Justified parameter to CategoryAxis.
• Tooltip:
  • Added collision settings.
• TreeList:
  • Added export to Excel.
  • Added Size parameter.
• TreeView:
  • Cyclic TreeView data causes stack exhaustion.
• Window:
  • Added an option to customize the default keyboard shortcuts.
• Wizard:
  • Added option to customize the default keyboard shortcuts.
  • Added visible parameter for the wizard steps.

• AppBar:
  • Fixed issue where Secondary and Tertiary theme colors are missing.
• ColorPicker:
  • Fixed issue where keyboard navigation doesn't remove focused class.
  • Fixed exception when a short hex color value is used.
• DateInput:
  • Fixed issue where you cannot set value when AutoCorrectParts is false.
  • Fixed issue where year 2001 is shown instead of 0001 for the default (non-nullable) value.
  • Fixed issue where TimeOnly values are not displayed in specific non-US cultures.
• DropDownButton:
  • Fixed issue where DropDownButton renders text container when no content set.
• Editor:
  • Fixed issue where Editor loses text selection and cursor position after using tools.
• FileManager:
  • Fixed Null exception in Details (Preview) pane when deleting the selected item.
  • Fixed issue where programmatic selection does not populate Details (Preview) pane.
• FloatingLabel:
  • Fixed overlap input when setting the value before loading the data.
• Grid:
  • Fixed issue where batch deletion properly deletes all items.
  • Prevent full grid re-render on each keystroke in EditorTemplate.
  • Fixed issue where multi-column headers are not exported to Excel.
  • Fixed issue where locked column is not unlocked on state change.
  • Fixed issue where resizing a non-locked column displaces the first locked one.
  • Fixed issue where an exception is thrown for CheckBoxListFilter when used with ExpandoObject.
  • Fixed to use Save instead of Update as default button text in popup edit form.
  • Fixed Grid performance degradation when editing in-cell grouped data.
• MultiSelect:
  • Deselect selected item when user hit enter key.
• NumericTextBox:
  • Fixed in regards to preventing stale cleared state from propagating on the next ChangeValue call.
• Pivotgrid:
  • Fixed to make text label filtering case-insensitive for local data sources.
  • Fixed to remove field menus from configurator dictionary on dispose.
• Scheduler:
  • Fixed to prevent appointment overflow feedback loop on window resize.
  • Fixed issue where Delete and Backspace keys bypass AllowDelete value.
  • Top offset should be proportionally calculated based on the exact start time of the appointment.
  • Appointments height should be proportional to their timespan.
• TabStrip:
  • Fixed issue where ActiveTabIdChanged fires on app navigation.
  • Fixed exception on removing all visible tabs programmatically.
  • Fixed issue where scroll buttons do not show or hide on dynamic Tab add or remove.
• TextBox:
  • Input type password should not render role attribute.
• Tooltip:
  • When collision=fit the tooltip should not blink while cursor is over tooltip and anchor.
  • Corrected callout position when scrolling.
  • Fixed issue where theme colors: Info, Success, Warning, Error are missing.
• Window:
  • Fixed issue where predefined actions OnClick handler is not triggered.

• What's New:
  • Dependencies: Updated Telerik Document Processing Library (DPL) version to 2026.2.707.
• Chat:
  • Introduced 'SendButtonStyle' property.
• Controls:
  • Standardized clear button size and spacing across RadEntry, RadAutoComplete, and RadComboBox.
• Buttons:
  • Updated focus border appearance in Telerik themes.
• DataGrid:
  • Made the DataChangeFlags Property of the DataBindingCompleteEventArgs public.
  • Exposed an event that is raised when the content in the RadDataGrid is drawn.
  • Provided an option to dynamically hide column headers.
  • Added AI-powered semantic search capabilities that leverage vector embeddings - representing data as numerical vectors - to enable matching based on conceptual similarity rather than exact keywords, resulting in more relevant, context-aware results aligned with the user's intent.
• DropDownButton:
  • Updated pressed state color in MacCatalyst and iOS.
• TabView:
  • Added RTL (right-to-left) support.

• AIPrompt:
  • Fixed issue where text is not populated on suggestion Tap.
• AutoComplete:
  • [WinUI] Fixed issue where keyboard navigation in the suggestion view behaves incorrectly when using caching system and navigating between views.
• Chat:
  • [WinUI] [MacOS] Fixed issue where a NullReferenceException is thrown when opening the camera via the attachments RadDropDownButton and closing it.
  • Fixed issue where ChatMessageAttachments is missing hover focus visual state.
• DataGrid:
  • DataGrid EmptyContentTemplate now correctly hides when items are added to an ObservableCollection and shows when all items are removed.
  • Fixed issue where a NullReferenceException is thrown when rebuilding aggregates after a property change.
  • Fixed issue where a NullReferenceException is thrown during the cells measure phase.
• PromptInput:
  • [WinUI] [MacOS] Fixed issue where a NullReferenceException is thrown when opening the camera via the attachments RadDropDownButton and closing it.
  • Fixed issue where the 'More' button is not visible in opened state on Android.
• RichTextEditor:
  • [WinUI] Fixed issue where background color does not apply when changing the theme from the Windows settings.
• SideDrawer:
  • [iOS] Fixed issue where Open and Close Commands and Events are not working on a real device.
• SignaturePad:
  • Fixed unhandled "Sequence contains no elements" exception when executing the clear command while drawing.

• Chart-wizard: Fixed issue where apply to dropdown doesn't persist value on series type change.
• Dropdownlist: Fixed issue where aria-activedescendant points to non-existent id when defaultItem is active.
• Gantt: Fixed issue where it throws hydration mismatch error.
• Grid: Fixed issue where filter button is disabled for nested CompositeFilterDescriptors in filterService.
• Notification: Fixed issue where appendTo root reuses other notification's container.
• Pivotgrid: Fixed issue where chip removal fails after Apply in configurator.
• Pivotgrid: Fixed issue where configurator is scrolled when focusing a chip.
• Scheduler: Fixed to clear recurrence exceptions when editing a series.

• What's Improved:
  • Notification pop-ups in the Web Report Designer can now be closed manually.

• Configuration:
  • Fixed issue where a vulnerable SQLite version is referenced by the .NET implementation.
• Desktop Designer:
  • Fixed issue where a NullReferenceException is thrown when previewing a report book with externally styled child reports.
• PDF Rendering:
  • Fixed issue where alternative text of accessible items is read multiple times by Acrobat Reader's 'Read out Loud' functionality.
• Report Server:
  • Fixed issue where Active Directory users are migrated with an incorrect 'Federation' account type.
• Preview:
  • Fixed issue where print dialog does not open when the browser is set to always download PDFs.

• Content Security Policy Compliance for HTML5 Report Viewers:
  • HTML5-based report viewers now support strict Content Security Policy (CSP) environments through a nonce-based approach for trusted script execution. This enhancement enables customers to meet modern security requirements while preserving the full interactive reporting experience.
• What's Improved:
  • Notification pop-ups in the Web Report Designer can now be closed manually.
  • Deployed examples now include a CSP configuration project for the HTML5 Report Viewer.

• Configuration:
  • Fixed issue where a vulnerable SQLite version is referenced by the .NET implementation.
• Standalone Report Designer:
  • Fixed issue where a NullReferenceException is thrown when previewing a report book with externally styled child reports.
• Standalone Report Designer for .NET 8 and above:
  • Fixed issue where empty reports are created when connected to Report Server for .NET.
  • Fixed issue where reports cannot be created when connected to Report Server for .NET.
  • Fixed issue where Data Explorer does not show SqlDataSource's available fields when connected to Report Server for .NET.
• PDF Rendering:
  • Alternative text of accessible items is read multiple times by Acrobat Reader's 'Read out Loud' functionality.
• HTML5 Report Viewer:
  • Fixed issue where export notification does not clear when exporting is manually handled.
  • A 404 request to '/sass/fonts/kendo-font-icons.ttf' is sent when font icons are used.
  • Print dialog does not open when the browser is set to always download PDFs.

• Common:
  • Dependencies: Updated Telerik Document Processing Library (DPL) version to 2026.2.707.
• Chart (obsolete):
  • Breaking Changes: RadChart is now marked as [Obsolete]. This is the last release that includes the RadChart component. Its source code will be removed from the assembly in the next release. RadChart has been deprecated since Q3 2014 and does not support modern browsers. Migrate to RadHtmlChart for a fully supported, standards-based charting solution.
• DatePicker:
  • Invalid WAI-ARIA role, state or property for DatePicker.
• DropDownTree:
  • Added WAI-ARIA support to RadDropDownTree keyboard navigation.
• SegmentedComponent:
  • Provided SegmentedControl Designer for Visual Studio Design mode.

• Common:
  • Fixed Visual Studio Design time error rendering the control - Object reference not set to an instance of an object.
• AutoCompleteBox:
  • JavaScript error (Uncaught TypeError: Cannot read property 'keyCode' of undefined) is thrown when selecting an autocomplete suggestion in Chromium browsers.
• AsyncUpload:
  • Fixed issue where RadAsyncUpload can't be selected from RadTab using arrow key navigation.
• ColorPicker:
  • Fixed issue where localizing RadColorPicker using Resource-files is not working.
  • Fixed issue where RadColorPicker remains clickable when disabled on client-side.
• ComboBox:
  • Fixed RadComboBox infinite "Loading..." issue after upgrading to 2026.1.225.
• DatePicker:
  • Fixed issue where Date/Time/DateTime Picker Items not aligned properly after Q2 update.
• DropDownTree:
  • Fixed issue where RadDropDownTree With CheckBoxes="CheckChildNodes" and CheckChildNodes="false" has no effect.
• Editor:
  • Track Changes - Fixed issue where table insertion loses its tracked change marker after creating a new paragraph.
  • Fixed issue where Nested Ordered/Unordered lists fail to maintain order in Chrome.
• ListBox:
  • Fixed issue where RadListBox checked items are not available on the server if the control is enabled on the client.
  • Fixed issue where RadListBox resets scroll position to 0 upon item selection after mouse wheel scrolling.
• NumericTextBox:
  • Fixed issue where NumericTextbox SpinButton layout changed with 2026.2.
• Scheduler:
  • Fixed issue where the tooltips on the navigation buttons display "next day" and "previous day" when navigating month and week.
• SearchBox:
  • Fixed issue where the "Show All Results" in SearchBox is not accessible with a keyboard.
• Signature:
  • Fixed issue where changing the size of the Signature by changing the size of the viewport leads to the misplacement of the stroke.

• Grid: Added proxy scroller for vertical virtualization.
• Grid: Added proxied overlay scrollbar for virtual scroll mode.
• Inputs: Implemented OTPInput component.

• Animation: Resolved glitch issue.
• Checkbox: Fixed to allow space key to trigger native change event on Checkbox.
• Combobox: Fixed to focus ComboBox input after clear button click.
• Combobox: Fixed to reset ComboBox focused item when filter text is active.
• Dateinputs: Fixed to handle midnight (hour 0) correctly in DayPeriodService AM/PM logic.
• Dropdowns: Fixed to update popup width when component width changes dynamically.
• Gauges: Fixed to correct center template position on initial render.
• Grid: Fixed to allow norecords template to grow for wrapped messages.
• Grid: Fixed issue regarding checkbox cells triggering selection when clicking the checkbox and parent cell.
• Grid: Fixed to close column menu popup on scroll to prevent positioning issues.
• Grid: Fixed toolbar-tools popup misalignment and stale filter state in adaptive mode.
• Grid: Fixed to prevent empty grid after row selection and filter clearing with virtualization.
• Grid: Fixed to prevent grid virtualization to shows blank space with parent transform.
• Grid: Fixed to resolve correct column title when field name is "value".
• Grid: Fixed to sync GridToolbarColumnsChooser with programmatic columnsState updates.
• Listbox: Fixed keyboard nav work.
• Multiselecttree: Fixed to deselect all ancestor items in MultiSelectTree with 3+ nesting levels.
• Numerictextbox: Fixed to reject % character in NumericTextBox for non-percent formats.
• Panelbar: Fixed issue where nested items with expanded prop are not applied when parent is initially collapsed.
• Popup: Fixed to correct popover alignment under CSS zoom.
• Popup: Fixed to increase default z-index to render above TabStrip animation container.
• Scheduler: Fixed to align all-day custom-height events and pack adjacent ranges on same row.
• Scheduler: Fixed incorrect events order when using custom view item.
• Scheduler: Fixed to preserve events' custom order.
• Scheduler: Fixed scope all-day boundary overlap by height mode.
• Slider: Fixed to remove unnecessary offset in rtl draghandle positioning.
• Tabstrip: Fixed to remove incorrect aria-hidden on active tab panel.
• Timepicker: Fixed to return focus to input when TimePicker Cancel is clicked.
• Toolbar: Fixed to sync ToolbarOverflowSection children on re-render.
• Treelist: Fixed to prevent treelist getselectedstate from failing with enabled virtual scrolling.
• Webmcp: Fixed tools coverage.

• PdfProcessing:
  • Handled import of documents with missing FontDescriptor definition.
  • Allowed authentication of documents with OwnerPassword.
  • Handled merge of documents containing fields with the same invalid name.
  • Handled the import of documents with invalid cross-reference stream offset.
  • Updated the fx:Version metadata mapping for the XRechnung conformance level.
  • Handled the case where the document has edit, copy password but no open password.
  • Introduced Clone for elements in RadFixedDocument.

• PdfProcessing:
  • PdfStreamWriter: Duplicated pages when merging documents with identical page content streams but different per-page Resources.
  • Glyphs overlap due to incorrect casting of glyph widths from Double to Int.
  • An InvalidOperationException is thrown when exporting a PDF document with a set compliance that processes Type3 font glyphs.
  • MethodAccessException is thrown when exporting documents using .NET Standard references in a .NET Framework environment.
  • A NullReferenceException is thrown when importing a document with missing Owner (O) in tagged structure attributes.
  • Signature validation reports file as modified while Adobe Acrobat reports not modified.
  • A StackOverflowException caused by an infinite parent-child loop in the StructureTree.
• WordsProcessing:
  • StackOverflowException is thrown during export when resolving unpopulated style properties of a document with circular style links.

• Common:
  • The target framework-specific NuGet packages (UI.for.WinForms.AllControls.Net462/Net48/Net80/Net90) will be discontinued starting in Q3 2026. To reference a package containing all controls, use the multi-target Telerik.UI.for.WinForms.AllControls NuGet package instead.
• Dependencies:
  • Updated Telerik Document Processing Library (DPL) version to 2026.2.624.

• RadNavigationView:
  • Fixed issue regarding a design time error message when using Property Builder in .NET Framework project.
• RadPdfViewer:
  • Fixed exception: Could not load Microsoft.Web.WebView2.WinForms.
• RadPropertyGrid:
  • Fixed issue where ReadOnlyAttribute is not respected when added to Attributes collection.
• RadScheduler:
  • Appointments with a duration of less than 1 minute are not visible in RadPrintPreviewDialog.
• RadSpreadsheet:
  • Incompatibility with Microsoft Excel of in-document Hyperlinks referencing worksheets with name containing spaces.
  • Worksheet name is editable when the workbook is protected.
• RichTextEditor:
  • Underline color reset to black after export using RtfFormatProvider.
• Visual Studio Extension:
  • WinForms Extension causes Visual Studio to crash.
  • Visual Studio 2026 becomes unresponsive when many files are saved.

• Common:
  • Dependencies: Updated Telerik Document Processing Library (DPL) version to 2026.2.624.
• Chat:
  • Improved MouseOver state of download attachment button in Material, VS2019 and Crystal themes.

• Common:
  • Fixed issue in a new Telerik csproj from VSExtensions using NuGets, trying to type in MainWindow.xaml freezes the VS window.
  • Fixed issue where the upgrade wizard for WPF does not work with projects targeting 4.8 .NET Framework.
• BusyIndicator:
  • Fixed issue where the busy animation continues running in the background when the RadBusyIndicator gets unloaded.
• Chart:
  • Fixed error when loading resources in for RadChart.
• Chat:
  • Fixed issue where messages that use MessageDisplayPosition.Overlay and MessageDisplayPosition.Popup are not displayed when added before the chat is loaded.
• RichTextBox:
  • Fixed issue where hovering a DocumentPosition instance in Visual Studio during debug shows DebuggerDisplay reaches max recursion count error.
  • Fixed unexpected cursor behavior with left arrow key.
  • Fixed memory leak when changing the documents.
• Spreadsheet:
  • Fixed issue where the items in the named ranges drop down list don't display the underscore character if presented in the name of the range.

• Maskedtextbox: Fire onTouched on every blur for updateOn: 'blur' forms.

• Buttons: Fixed issue where border styling glitches on initial render.
• Dateinputs: Fixed issue where border styling glitches on initial render.
• Dateinputs: Fixed issue where form remains invalid after resetting incomplete dateinput.
• Draganddrop: Fixed issue where img elements cannot be dragged and dropped.
• Draganddrop: Fixed incorrect hint position when drag delay is enabled.
• Dropdownbutton: Fixed issue where clicking a disabled item closes popup.
• Dropdowns: Fixed issue where border styling glitches on initial render.
• Dropdowns: Fixed issue where setting expandonfilter causes incorrect expandedkeys upon closing popup.
• Editor: Fixed issue where indent and outdent tools are not working in RTL mode.
• Grid: Fixed issue to align reorderable header cursor interactivity without field.
• Grid: Fixed issue regarding a blank viewport when collapsing last group with virtual scroll.
• Grid: Fixed issue where you cannot select date from filter menu on mobile.
• Grid: Fixed issue where clipboard excludes grouped columns.
• Grid: Fixed duplicated values for deselected cells in selection event.
• Grid: Fixed issue where no-records cell is missing gridcell role.
• Grid: Fixed to resolve nested field path extraction in multi-checkbox filter.
• Grid: Fixed to use interactive cursor for reorderable no-field headers.
• Inputs: Fixed issue where border styling glitches on initial render.
• Maskedtextbox: Fixed incorrect value after changing the mask.
• Maskedtextbox: Fixed issue where values matching mask literals are not displayed.
• Promptbox: Fixed issue where border styling glitches on initial render.
• Timeline, spreadsheet: Fixed to polish internal button classes.
• Toolbar: Fixed issue where button group buttons become toggleable when overflowed.
• Treelist: Fixed incorrect footer template data with virtual columns.
• Treeview: Fixed issue where the blur method is not working on initially selected item.
• Treeview: Fixed issue where loading icon shifts TreeView node text on expand.
• Treeview: Fixed issue where loading indicator gets stuck after drag-and-drop reorders node index.

• What's New:
  • The Agent Tools can convert to and from Markdown documents.
• PdfProcessing:
  • Introduced support for Encryption Algorithm 7.
  • Introduced support for Legacy X.509 RSA Signature.
  • Introduced support for XRechnung compliance.
  • OS-Based Automatic Font Resolution Fallback.
  • Improved font handling during document export.
• SpreadStreamProcessing:
  • SpreadStreamProcessing: Added support for AutoFilter.
• WordsProcessing:
  • PdfFormatProvider: Export accessible PDFs.

• PdfProcessing:
  • .NET Standard: ArgumentOutOfRangeException: 'Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')' during import.
  • Bullet character lost after import/export round-trip.
  • Fonts are not merged when merging documents.
  • Image duplication after import-export when working with images that have different streams but same metadata.
  • JavaScripts collection of RadFixedDocument is not cleared by StripJavaScriptActions export setting.
  • Links in table cells are not correctly tagged.
  • NetStandard: KeyNotFoundException when getting glyph for rendering when having Type 1 font.
  • NetStandard: Mispositioned glyphs after import/export with non-embedded fonts.
  • Newly created SignatureDataProperties object misses Contents initialization.
  • NotSupportedException is thrown when encoding an image with Indexed color space.
  • An OverflowException: 'Arithmetic operation resulted in an overflow.' is thrown when importing a document and endstream is not on a new row.
  • SkiaImageFormatProvider: NullReferenceException is thrown when rendering a glyph (H22073) with not found GlyphData.
  • Some signatures are displayed as invalid or unknown.
  • Unable to obtain the value of incrementally updated fields.
  • An empty glyph outlines collection when registered font with TrueType collection.
  • Exception when merging file (PdfStreamWriter) that contains color spaces with specific data.
  • Exported protected document containing SignatureField can not be opened.
  • Page content is corrupted when merging pages whose content is an array of content streams.
  • PdfStreamWriter: Incorrect file is produced when merging a stream more than 40 times.
  • The casing of the font name should not be respected when comparing font names to find from collection.
• SpreadProcessing:
  • Number format for the chart axis is lost on import/export.
  • System.InvalidOperationException: 'The axes are incorrectly paired.'.
  • XlsxFormatProvider: System.NullReferenceException: 'Object reference not set to an instance of an object.' when importing a worksheet with images in .NET Standard.
  • The WorkbookContentChanged event is not fired just after importing a document.
  • ArgumentException thrown when file contains format string with modificator like [Color11] etc.
• WordsProcessing:
  • Horizontal indentation before text is applied to after text as well.
  • Arabic text's Font size and font family changes after export.
  • HtmlFormatProvider: Multiple CSS classes on an element are not correctly resolved when converted to inline styles.
  • HtmlFormatProvider: Width property defined in style is not respected in the element.
  • PdfFormatProvider: OutOfMemoryException is thrown during PDF export of a document that has floating shapes whose wrap zones block vertical progress.
  • PdfFormatProvider: OutOfMemoryException is thrown during PDF export of a document that has a paragraph indent larger than the cell width.
  • PdfFormatProvider: Header/Footer containing a page break fails to export with StackOverflowException.
  • RtfFormatProvider: Unable to open DOCX-exported document in MS Word due to large tab stop accumulation.
  • Cell background is not inherited from table background.

• Introducing AI Report Generator in Web Report Designer:
  • Added a GenAI-powered "AI Assist" component to the Web Report Designer to accelerate report creation. Authors can now input natural language prompts to instantly generate, safely preview, and iteratively refine styled charts and gauges bound to real data sources.

• Standalone Report Designer:
  • Using the "Download raw data" functionality before all the report pages are loaded causes a NullReferenceException.
• Windows Forms Report Viewer:
  • The report viewer throws an exception when an expired license is detected.
• WinUI Report Viewer:
  • The report viewer throws an exception when an expired license is detected.
• WPF Report Viewer:
  • The report viewer throws an exception when an expired license is detected.

• Report Server:
  • Fixed issue where the "Allow Reading Nested Reports" permission cannot be applied to the Guest user.

• Added support for Angular 22.

• Window, dialog: Fixed issue regarding custom titlebar content getting id.

• [Android] Fixed issue where a NullReferenceException occurs when setting the picker format in App.xaml using version 14.0.0.

• Grid: Fixed issue where accessing activeRow triggers an error.
• Grid: Fixed incorrect select-all state with non-selectable rows upon paging.
• Grid: Fixed incorrect selectAll checkbox state when toggling with isRowSelectable.
• Treelist: Fixed issue where select all checkbox does not respect checkChildren configuration.
• Treelist: Fixed issue where some columns are not rendered when toggling their visibility with locked and virtual.

• Colorpicker: Fixed unexpected scroll jump when opening the popup.
• Combobox: Fixed issue where selected value with newline chars is not retained on blur.
• Grid: Fixed issue where IME input causes duplicated value and incorrect focus when cell editing.
• Grid: Fixed issue where keyboard navigation is not working with group header template.
• Scheduler: Fixed issue where focus is stolen when data becomes empty.
• Textbox, textarea: Fixed issue where undefined is displayed as literal string when passed as value.
• Tooltip: Renamed themeColor property to tooltipThemeColor.

• Gantt: Fixed issue where tooltip shows stale completion ratio after task progress drag.
• Multiselect: Fixed issue where items with numeric value 0 are not selected when Ctrl + A is pressed.
• Window: Fixed incorrect position offset when dragging inside a relatively positioned wrapper.
• Window: Fixed issue where programmatic state changes are ignored after titlebar actions.

• Introduced WebMCP support, making Kendo UI for Angular components agent-ready out of the box.
• Added support for the new Kendo UI Meridian theme.
• Added support for Kendo UI Icons v5.0.0.
• Added codemods for breaking changes.
• Charts: Added highlight to category axis item.
• Chat: Added support for remote data.
• Chat: Introduced autoScrollThreshold property.
• Chat: Introduced endless scrolling.
• Diagram: Added rich text support for Shapes and Connections.
• Dialog: Implemented closable option.
• Filter: Introduced fields template.
• Filter: Introduced operator template.
• Grid: Added row pinning.
• Grid: Added sticky group headers and footers.
• Listbox: Added no-data template.
• Listview: Added no-data template.
• PDFViewer: Added clear method.
• SVGIcon: Added variant property.

• Buttons: Fixed incorrect and missing a11y attributes.
• Charts: Fixed issue where line style string binding does not work.
• Charts: Removed deprecated style input from series-item.
• Chat: Fixed issue where loadMore emits incorrect end index with remote data.
• Chat: Fixed issue where messagebox separator is not rendered with remote data.
• Contextmenu: Fixed issue where setting vertical to false does not work.
• Dateinputs: Fixed issue where clear button is not shown after form-driven date updates.
• Drawer: Fixed issue where dialogs and popups are not positioned correctly.
• Drawer: Fixed trimmed in mini mode in some Kendo Themes.
• Drawer: Fixed unnecessary scroll when separator is the last item.
• Filter: Fixed issue where you cannot set custom operator value initially.
• Form: Fixed formservice not being scoped to form instance.
• Gantt: Fixed issue where year view label cannot be translated.
• Grid, treelist: Fixed role missing from multicolumn header cells.
• Grid: Fixed resizing issues with autofit.
• Grid: Fixed adjust column menu rendering.
• Layout: Fixed incorrect and missing a11y attributes.
• Listbox: Fixed incorrect a11y attributes.
• Menus: Fixed incorrect and missing a11y attributes.
• Multiselect: Fixed issue where you cannot select items in some iOS versions.
• Navigation: Fixed incorrect and missing a11y attributes.
• Pivotgrid: Fixed issue where clear button in chip menu throws error.
• Progressbar: Fixed incorrect animation when max and value decrease simultaneously.
• Scheduler: Fixed issue where event focus affects other scheduler instances.
• Scheduler: Fixed inconsistent week range when switching from Sunday to work week view.
• Scheduler: Fixed issue where kendoSchedulerDateHeaderTemplate causes misalignment.
• Scheduler: Fixed issue where kendoSchedulerGroupHeaderTemplate causes misalignment.
• Scheduler: Fixed issue where month vertical group headers misalign.
• Scheduler: Fixed issue where slotClass end is incorrect.
• Splitter: Fixed issue where k-pane-static class is not restored after expanding a pane.
• Splitter: Fixed issue where pane with fixed size is not persisted when resizing or collapsing other panes.
• Stepper: Fixed incorrect connection line rendering with a single step.
• Switch: Fixed issue where it throws ExpressionChangedAfterItHasBeenCheckedError when associating with label[for].
• Textbox, dateinput, button, multiselect: Fixed issue where styling glitches on initial render.
• Toolbar: Fixed incorrect display style for tools in section overflow mode.
• Toolbar: Fixed incorrect values and missing a11y attributes.
• Toolbar: Fixed issue where it throws hydration mismatch error.
• Tooltip: Fixed incorrect values and missing a11y attributes.
• Treeview, notification: Removed redundant aria-hidden attributes.
• Treeview: Fixed issue where built-in filtering is not working when drag-and-drop is enabled.
• Treeview: Fixed issue where changing filterSettings does not re-apply the correct filter.
• Treeview: Fixed issue where filter input loses focus when a node is selected.
• Treeview: Fixed filter reset after data update using the binding directives.
• Treeview: Fixed incorrect and missing a11y attributes.
• Treeview: Fixed issue where tab navigation skips TreeView after filtering removes the focused node.
• Upload: Fixed incorrect and missing a11y attributes.

• Common:
  • Added Meridian Theme.
  • Added the ability to translate Kendo messages in all supported languages.
  • Loader Container overlay class changed from k-overlay-light to k-overlay.
  • Caret icons replaced with chevron icons.
  • Light and Dark theme colors removed globally.
  • Added support for Meridian Theme Package v14.1.0.
  • Added support for Fluent Theme Package v14.1.0.
  • Added support for Classic Theme Package v14.1.0.
  • Added support for Bootstrap Theme Package v14.1.0.
  • Added support for Default Theme Package v14.1.0.
  • Added support for Material Theme Package v14.1.0.
• Button:
  • Button Size option type changed to accept xsmall, and ComponentSize changed to ButtonSize.
• Chat:
  • Added Chat endless scrolling feature.
• Dialog:
  • Removed Dialog themeColor option.
• Gantt:
  • Gantt view selector changed from ButtonGroup to SegmentedControl.
• Grid:
  • Added sticky groups.
  • Added row pinning.
• PDFViewer:
  • PDFViewer Loader overlay class changed from k-overlay-light to k-overlay.
• Scheduler:
  • Scheduler view selector changed from ButtonGroup to SegmentedControl.
• Window:
  • Removed Window themeColor option.

• Avatar:
  • Fixed issue so that Avatar image URL can be escaped.
• Chat:
  • Fixed Chat filesTemplate regression.
• ChipList:
  • Fixed issue where you were unable to prevent ChipList select event.
• ComboBox:
  • Fixed issue where the setOptions method of the ComboBox does not reset the height configuration.
• ContextMenu:
  • Fixed missing class k-menu-group on ContextMenu ul element.
  • Fixed issue where aria-expanded false attribute set to Menu items with no child items unexpectedly.
• DropDownButton:
  • Fixed issue where the DropDownButton API does not expose all configuration options for Popup customization.
• DropDownList:
  • Fixed JS error thrown by adaptive DropDownList on resizing browser from mobile to desktop width.
• Editor:
  • Fixed issue where Editor inside iframe resolves the wrong document object.
  • Fixed issue where export tool message is displayed as a tool title.
  • Fixed issue where Editor formatting creates redundant span element.
  • Fixed issue where Editor closes Source element tags.
• FileManager:
  • Fixed issue where Filemanager filters folders after clearing the search.
• Filter:
  • Fixed issue where using keyboard navigation does not focus elements in main Filter toolbar.
• Gantt:
  • Fixed issue where Gantt events ending on 31st of December are not visible in Month and Year view in Firefox.
• Grid:
  • Fixed issue where a JS error is thrown when initializing an initially hidden stacked-layout Grid.
  • Fixed wrong position of Grid drop clue indicator k-reorder-cue in RTL.
• Menu:
  • Fixed issue where aria-expanded false attribute set to Menu items with no child items unexpectedly.
  • Fixed issue where scrollable menu opens wrong menu on mobile.
• PivotGrid:
  • Fixed issue where an ampersand in column values prevents column from expanding.
• Scheduler:
  • Fixed issue where scrolling Scheduler when dragging events is not possible in RTL Scheduler.
• Signature:
  • Fixed issue when using the Signature in a Wizard the drawing line is being offset.
  • Fixed Kendo Signature span between signature line and pen/mouse cursor.
• Spreadsheet:
  • Fixed issue where you are unable to change Spreadsheet cell format via Format dialog.
  • Fixed issue where you are unable to translate the items in the DropDownButton for the Spreadsheet's sheet tabs.
  • Fixed issue where Spreadsheet filter icons do not respect rowHeight.
• TaskBoard:
  • Fixed issue where TaskBoard tasks cannot be reordered in the same column.
• TimeDurationPicker:
  • Fixed TimeDurationPicker label issues.
• Window:
  • Fixed incomplete typescript definitions for the Window title.

• Added support for the new Kendo UI Meridian theme.
• Added support for Kendo UI Icons v5.0.0.
• Grid: Added CSV export.
• Replaced axios with browser fetch.

• Progressbars: Fixed to hide progressbar value when it is zero.

• Introduced WebMCP support, making KendoReact components agent-ready out of the box.
• Added support for the new Kendo UI Meridian theme.
• Added support for Kendo UI Icons v5.0.0.
• Added localization messages to new aria attributes.
• Calendar: Converted calendar to functional component.
• Chip: Added aria selected prop.
• Dropdowns: Added ariaLabel prop to AutoComplete, DropDownTree and MultiSelectTree.
• Grid: Added aria has popup prop to header.
• Grid: Removed axios default usage.
• Listbox: Updated rendering and aria attributes.
• Listview: Added aria-posinset and aria-setsize to listview item.
• Loader: Added aria label prop.
• Menu: Converted menu to functional component.
• Radiobutton, rangeslider: Added aria label prop.

• Buttons: Fixed modify toolbar functionality for adaptive mode.
• Chip: Fixed issue where blur does not remove focus.
• Datetimepicker: Fixed issue where time is not set when clicking set directly without changing the value.
• Editor: Fixed inconsistent table wizard action buttons layout.
• Grid: Fixed accumulate data state changes from multiple synchronous operations.
• Grid: Fixed Tab key getting stuck in tabbed column menu.
• Grid: Fixed issue to preserve operator when clearing column menu filter value.
• Grid: Fixed issue to prevent drag clue from overflowing viewport on long column titles.
• Grid: Fixed issue to prevent pagination reset when clearing empty column menu filter.
• Grid: Fixed issue where the type of the cells prop on the columns is incorrect.
• Inputs: Fixed to localize ColorPicker Apply/Cancel buttons and expose showButtons prop.
• Layout: Fixed TileLayout rendering parity and drag-drop flicker.
• Layout: Removed default size class and fixed a11y attrs in Breadcrumb.
• Map: Added missing template prop to MapMarkerLayerProps.
• Switch: Fixed to prevent double toggle of Switch wrapped in label on Firefox.
• Timepicker: Fixed to use the correct value for NOW button in adaptive TimePicker.
• Tooltip: Fixed anchor tooltip to titled ancestor when parentTitle is true.
• Tooltip: Fixed export tooltip handle.
• Tooltip: Reduced tooltip flickering between SVG elements.

• Added support for the new Meridian theme.
• Added automatic variable values.
• Added support for Q2 2026 Kendo UI components.
• Deprecated old versions of Kendo UI components.

• Fixed issue where CSS rules for Kendo Cоmponent like DropDownList are always generated for k-animation-container-shown.
• Fixed issue where interacting with the Form component in Q1 26 breaks the ThemeBuilder application.

• JustMock now supports Runtime-Native Async (Runtime Async V2), introduced with .NET 11 Preview 3.
• Updated the JustMock Framework documentation to improve AI-generated response accuracy.

• Fixed an issue where Visual Studio 2026 code analysis features were disrupted after the 18.4 update.
• Resolved a "Read out of bounds" debugger exception that occurred during active profiling sessions with JustMock. The fix is available in the latest JetBrains version, see RIDER-138867.

• Entity Framework Core Data Source component:
  • Developers can now bind reports directly to Entity Framework Core DbContext models using a dedicated data source component. The new EF Core Data Source is available in the Standalone Report Designer for .NET and the Web Report Designer, with support for design-time data preview, Shared Data Sources, and parameterized queries.
• What's Improved:
  • The Windows distribution of Report Server for .NET is now bundled with Standalone Report Designer for .NET.
  • The Reporting engine now loads available rendering extensions on demand for faster application startup.
  • The Reporting engine now supports Firebird .NET Client Data Provider out-of-the-box without manual configuration.
  • The HTML5 Report Viewer now uses CSP-compliant templates instead of inline templates.

• Web Designer:
  • Fixed issue where an HtmlTextBox containing two paragraph (P) elements is not rendered correctly.
• Processing:
  • Fixed issue where incorrect headers are applied when encoding a UPS MaxiCode barcode.
  • Fixed issue where the RAG optimization of AI-Powered Insights is not applied when the AI model returns a formatted boolean response.
  • Fixed issue where a race condition in the cache locking mechanism may break the exclusive locking on Linux/macOS.
  • Fixed issue where NavigateToReport actions do not work in some report directory configurations.
• HTML Rendering:
  • Fixed issue where font substitution does not take effect and the original font is used instead.
• Server REST API:
  • Fixed issue where a 'Provided document Id has expired' error occurs intermittently for report image requests behind a load balancer.

• What's Improved:
  • The Native Blazor Report Viewer example projects now include code samples for the new viewer events.
  • The Reporting engine now loads available rendering extensions on demand for faster application startup.
  • The Reporting engine now supports Firebird .NET Client Data Provider out-of-the-box without manual configuration.
  • The licensing banners in the Native Blazor and Angular Report Viewers no longer display the call-to-action text.
  • The HTML5 Report Viewer now uses CSP-compliant templates instead of inline templates.
• What's Changed:
  • Native Blazor Report Viewer now provides an extended set of viewer events. The export-related event names are changed for consistency.

• Web Designer:
  • Fixed issue where an HtmlTextBox containing two paragraph (P) elements is not rendered correctly.
• Processing:
  • Fixed issue where incorrect headers are applied when encoding a UPS MaxiCode barcode.
  • Fixed issue where the RAG optimization of AI-Powered Insights is not applied when the AI model returns a formatted boolean response.
  • Fixed issue where a race condition in the cache locking mechanism may break the exclusive locking on Linux/macOS.
  • Fixed issue where NavigateToReport actions do not work in some report directory configurations.
• HTML Rendering:
  • Fixed issue where font substitution does not take effect and the original font is used instead.
• WPF Report Viewer:
  • Fixed issue where the viewer crashes on second launch when using a trial license.
• Visual Studio Item Templates:
  • Fixed issue where the SampleReport added with the item template contains outdated links.

• What's New:
  • Added PromptInput. A rich prompt composer control for AI/chat scenarios that combines multiline text entry with send, speech-to-text, file/photo attachment, customizable actions, and adaptive compact/expanded layout behavior.
  • Added DropDownButton. A control that allows displaying a drop-down content area when clicked, enabling users to select options or display additional information.
  • Updated to .NET 10 MAUI 10.0.60 (SR6).
  • Deleted ListView control from Telerik UI for .NET MAUI.
• Dependencies:
  • Updated Telerik Document Processing Library (DPL) version to 2026.2.519.
• AIPrompt:
  • Replaced Microsoft.Maui.Controls.Editor with RadEditor in AIPromptInputViewControlTemplate.
• Chat:
  • Replaced RadToolbar with RadDropDownButton for attachments and more options.
• DataForm:
  • Added new multiline text editor - DataFormRadMultiLineEditor.
  • Changed the default editor for html and multiline text from DataFormMultiLineEditor to DataFormRadMultiLineEditor.
• DataGrid:
  • Renamed PointerOver visual state of DataGridAISendButton to MouseOver.
  • Renamed PointerOver visual state of DataGridAIFloatingActionButton to MouseOver.
• DataPager:
  • Renamed PointerOver visual state of DataPagerButton to MouseOver.
• Gauge:
  • Added a LabelFormatter that can be used to apply different formats to the axis labels.
• Scheduler:
  • Replaced Microsoft.Maui.Controls.Editor with RadEditor in EditAppointmentDialog.
• SegmentedControl:
  • Added BorderBrush, BorderThickness, and CornerRadius support by inheriting RadSegmentedControl from RadBorder.
  • Added ItemTemplate and DisplayMemberPath APIs through which the default content of the segments can be changed or bound to complex business objects.
  • Added ItemViewStyle and ItemViewStyleSelector, through which the segments can be styled (e.g. font size or font family).
  • [MacCatalyst] [WinUI] Added keyboard support: Left/Right arrow keys and Tab/Shift+Tab to navigate between segments, and Enter/Space to select them.
  • Added SelectionMode with None, Single, and SingleDeselect modes.
  • Added SeparatorStyle and SelectionIndicatorStyle to style the separators between items and the selection UI.
  • Added RTL (right-to-left) support.
  • Removed RadSegmentedControlHandler and replaced the control's implementation with a ControlTemplate.
• SpeechToTextButton:
  • Renamed PointerOver visual state to MouseOver.
• TemplatedButton:
  • Added keyboard navigation.
  • Renamed PointerOver visual state to MouseOver.
• ToggleButton:
  • Added keyboard navigation.

• Border:
  • [WinUI] Fixed issue where COMException is thrown in MAUI SR6 when RadBorder is placed in a CollectionView ItemTemplate.
• Chat:
  • [Android] [iOS] Fixed issue where visible typing indicator causes the first couple of messages to get outside the visible area of the screen.
• CollectionView:
  • Fixed issue where sticky group header items count does not update when adding or removing items from the group.
  • Fixed issue where item cannot be dropped into an empty CollectionView that is measured with infinite size since version 11.1.0.
  • Fixed issue where items do not display after scrolling, navigating back, and returning to the page.
  • [WinUI] Fixed issue where an exception is thrown when interacting with a ComboBox placed inside the ItemTemplate of a CollectionView.
• DataGrid:
  • [WinUI] Fixed issue where a memory leak is observed when DataGrid is placed in a FlyoutPage. The issue was caused by .NET MAUI on .NET 9 and is no longer present in .NET 10.
  • [iOS] Fixed issue where SelectionOnFocus does not apply for DataGridTextColumn.
  • Fixed issue where cells are not aligned as expected when a monospace font is applied.
• PdfViewer:
  • Fixed NullReference Exception when opening the PdfViewerSearchNavigationToolbarItem to search second time.
  • Fixed issue where image elements with alpha transparency are rendered solid.
  • Fixed issue where text elements with alpha transparency are rendered solid.
• Popup:
  • [WinUI] Fixed issue where NullReferenceException is thrown in PointerPressed handler.
• Scheduler:
  • Fixed issue where NullReferenceException is thrown in AgendaView when ActiveViewDefinitionIndex is set in XAML.

• Common:
  • Added new SegmentedControl component.
  • Updated Telerik Document Processing Library (DPL) version to 2026.2.519.
• Editor:
  • ImageManager and RadFileExplorer now support .avif, .heif, .heic and .webp file extensions.
  • Added the ability to resize the table columns and rows with the mouse in the content area.
  • Improved the StripJavaScriptUris content filter.
• Input:
  • Added password textbox with show/hide feature.
• ListBox:
  • Allows lazy loading of images with design-time templates.
• Navigation:
  • Added Separator feature to the RadNavigation control.
• PdfProcessing:
  • Handled import of documents with missing/invalid rectangle (re) operands.
  • Handled invalid ASCII85Decode filter scenario - PDF streams where the end-of-data marker contains whitespace.
  • Added import-export support for ShadingType 1.
  • Added import-export support for ShadingType 4.
  • Added import-export support for ShadingType 6.
  • Added import-export support for ShadingType 7.
  • Exposed internal GrayColor object.
  • Introduced support for signing multiple Signature fields.
• SpreadProcessing:
  • Cell rotation is now respected when exporting the workbook to PDF.
  • Introduced calculation chain functionality.
• WordsProcessing:
  • Introduced support for the Markdown file format, allowing import/export from/to markdown format.
  • TxtFormatProvider: Introduced support for export of Lists.

• Common:
  • Fixed 500 "The cryptographic operation has failed" when loading combined resource URLs with EnableHandlerEncryption after URL rebuild.
  • Fixed 404 on combined resource URL when EnableHandlerEncryption is enabled - URL exceeds max length due to plaintext length check.
  • Fixed JS error when hovering a menu after partial postback when a RadButton is in an UpdatePanel and the Telerik.Web.UI.WebResource.axd URL is encrypted.
  • Fixed "The cryptographic operation has failed!" error when showing a hidden control and there is RadStyleSheetManager and EnableHandlerEncryption=true.
• AsyncUpload:
  • Fixed issue where RadAsyncUpload "Drop Files here" element remains visible when dragging a file quickly over and out of the DragZone.
• CheckBox:
  • Fixed issue where screen readers announce "checked/ not checked" when CheckBox feature is disabled.
• ColorPicker:
  • Fixed broken web palette layout - first column misaligned from the rest (Lightweight renderer).
  • Fixed issue where zooming breaks the colorpicker.
  • Fixed issue where the colorpicker pallet is corrupted in Firefox with different Windows Screen zoom levels.
• DateRangePicker:
  • Fixed issue where RadDateRangePicker method set_rangeSelectionStartDate and set_rangeSelectionEndDate are not working as expected.
• Editor:
  • Fixed issue after pasting from MS Word, where StripSpan does not work until a mode change to HTML and back to Design.
• Grid:
  • Fixed issue where scrolling on a mobile (touch) device is impossible with the Lightweight RenderMode when an HTML element takes up the entire grid row.
  • Fixed issue where the Grid's Horizontal scrollbar is not visible in iOS when the grid is empty.
• NumericTextBox:
  • Fixed issue where the ShowSpinButtons and Right Alignment cause the number to disappear behind the spinners.
• Rating:
  • Fixed issue where ratings are not working with body margin 0.
• TabStrip:
  • Fixed issue where the tab text is not being read by the screen reader.
  • Fixed accessibility issues for RadTabStrip and RadMultiPageView.
  • Fixed issue when keyboard navigation is enabled Tabs keep focus even after focusing other tabs.
  • Fixed issue where focus highlighting in TabStrip is not working properly with Keyboard Navigation.
• ToggleButton:
  • Fixed issue where icons in RadToggleButton disappear when using ConfirmSettings.
• PdfProcessing:
  • Fixed issue where a NullReferenceException is thrown when exporting a document with a Type 3 font with missing/invalid Unicode mapping.
  • PdfStreamWriter: Fixed issue regarding duplicated page content due to incorrect caching mechanism.
  • PdfStreamWriter: Fixed slow performance during page splitting.
  • SkiaImageFormatProvider: Fixed issue where NullReferenceException is thrown when exporting pages containing images with missing optional ColorSpace.
  • Fixed issue where XMP metadata is unescaped during import-export.
  • Fixed issue where document password cannot be resolved when document produced by the library contains a SignatureField.
  • Fixed issue where hidden PDF layers are imported as visible.
  • Fixed issue where an invalid PDF document is exported when inserting a specific Jpeg image with an ICC profile.
  • Fixed issue where a password is asked although Adobe opens the document without one.
  • Fixed CryptographicException because MD5 not available on Blazor WASM.
  • Fixed corrupted document when exporting Courier New subset.
  • NetStandard: Fixed missing content due to empty glyph outlines in embedded TrueType font subsets.
• SpreadProcessing:
  • Fixed issue where pasting a range in filtered rows overwrites their content.
  • Fixed issue where formatting string #.##0,00;-#.##0,00;;@ does not hide zero values.
  • Fixed issue where images don't move with cells when a row/column is inserted.
  • Fixed issue when setting value in a cell, where certain strings are recognized as dates instead of as text.
  • PdfFormatProvider: Fixed NotSupportedException: 'No imaging component suitable to complete this operation was found.'.
  • PdfFormatProvider: Fixed NullReferenceException when exporting PatternFill with PatternType.DiagonalStripe.
  • Fixed slow import for files with a lot of formulas.
• WordsProcessing:
  • Fixed issue where font of a style is changed on RTF import when the font is not explicitly defined in the style, and default character properties have font defined or is missing altogether.
  • HtmlFormatProvider: Fixed issue where styles are not correctly preserved when a bold tag is applied to the same styled element.

• Common:
  • Added Meridian Theme.
  • Added .NET 11 Preview 4 compatibility.
  • Added the ability to translate Kendo messages in all supported languages.
  • Loader Container overlay class changed from k-overlay-light to k-overlay.
  • Caret icons replaced with chevron icons.
  • Light and Dark theme colors removed globally.
  • Updated Telerik Document Processing Library (DPL) version to 2026.2.519.
  • Added support for Meridian Theme Package v14.1.0.
  • Added support for Fluent Theme Package v14.1.0.
  • Added support for Classic Theme Package v14.1.0.
  • Added support for Bootstrap Theme Package v14.1.0.
  • Added support for Default Theme Package v14.1.0.
  • Added support for Material Theme Package v14.1.0.
• Button:
  • Button Size option type changed to accept xsmall, and ComponentSize changed to ButtonSize.
• Chat:
  • Added Chat endless scrolling feature.
• Dialog:
  • Removed Dialog themeColor option.
• Form:
  • Added EditorTemplateViewFor in FormItemBuilder.
• Gantt:
  • Gantt view selector changed from ButtonGroup to SegmentedControl.
• Grid:
  • Added sticky groups.
  • Added row pinning.
• MultiViewCalendar:
  • MultiViewCalendar Footer() should accept a boolean parameter ASP.NET Core.
• PDFViewer:
  • PDFViewer Loader overlay class changed from k-overlay-light to k-overlay.
• Scheduler:
  • Scheduler view selector changed from ButtonGroup to SegmentedControl.
• Window:
  • Removed Window themeColor option.

• Avatar:
  • Fixed issue so that Avatar image URL can be escaped.
• Chat:
  • Fixed Chat filesTemplate regression.
• ChipList:
  • Fixed issue where you were unable to prevent ChipList select event.
• ComboBox:
  • Fixed issue where the setOptions method of the ComboBox does not reset the height configuration.
• ContextMenu:
  • Fixed missing class k-menu-group on ContextMenu ul element.
  • Fixed issue where aria-expanded false attribute set to Menu items with no child items unexpectedly.
• DropDownButton:
  • Fixed issue where the DropDownButton API does not expose all configuration options for Popup customization.
• DropDownList:
  • Fixed JS error thrown by adaptive DropDownList on resizing browser from mobile to desktop width.
• Editor:
  • Fixed issue where Editor inside iframe resolves the wrong document object.
  • Fixed issue where export tool message is displayed as a tool title.
  • Fixed issue where Editor formatting creates redundant span element.
  • Fixed issue where Editor closes Source element tags.
• FileManager:
  • Fixed issue where Filemanager filters folders after clearing the search.
• Filter:
  • Fixed issue where using keyboard navigation does not focus elements in main Filter toolbar.
• Gantt:
  • Fixed issue where Gantt events ending on 31st of December are not visible in Month and Year view in Firefox.
• Grid:
  • Fixed issue where Grid CaseSensitiveFiltering is not working with EF database.
  • Fixed issue where a JS error is thrown when initializing an initially hidden stacked-layout Grid.
  • Fixed wrong position of Grid drop clue indicator k-reorder-cue in RTL.
• Menu:
  • Fixed issue where aria-expanded false attribute set to Menu items with no child items unexpectedly.
  • Fixed issue where scrollable menu opens wrong menu on mobile.
• PDFViewer:
  • Fixed PdfViewer table of content.
• PivotGrid:
  • Fixed issue where an ampersand in column values prevents column from expanding.
• PropertyGrid:
  • Fixed issue where PropertyGrid throws JS error because appearance properties are serialized with null values.
• Scheduler:
  • Fixed issue where scrolling Scheduler when dragging events is not possible in RTL Scheduler.
• Signature:
  • Fixed issue when using the Signature in a Wizard the drawing line is being offset.
  • Fixed Kendo Signature span between signature line and pen/mouse cursor.
• Spreadsheet:
  • Fixed issue where you are unable to change Spreadsheet cell format via Format dialog.
  • Fixed issue where you are unable to translate the items in the DropDownButton for the Spreadsheet's sheet tabs.
  • Fixed issue where Spreadsheet filter icons do not respect rowHeight.
• TaskBoard:
  • Fixed issue where TaskBoard tasks cannot be reordered in the same column.
• TimeDurationPicker:
  • Fixed TimeDurationPicker label issues.
• Tooltip:
  • Fixed issue where Tooltip is not recalculating its dimensions when the target text is changed.
• Window:
  • Fixed incomplete typescript definitions for the Window title.

• Common:
  • Added Meridian Theme.
  • Added the ability to translate Kendo messages in all supported languages.
  • Loader Container overlay class changed from k-overlay-light to k-overlay.
  • Caret icons replaced with chevron icons.
  • Light and Dark theme colors removed globally.
  • Updated Telerik Document Processing Library (DPL) version to 2026.2.519.
  • Added support for Meridian Theme Package v14.1.0.
  • Added support for Fluent Theme Package v14.1.0.
  • Added support for Classic Theme Package v14.1.0.
  • Added support for Bootstrap Theme Package v14.1.0.
  • Added support for Default Theme Package v14.1.0.
  • Added support for Material Theme Package v14.1.0.
• Button:
  • Button Size option type changed to accept xsmall, and ComponentSize changed to ButtonSize.
• Chat:
  • Added Chat endless scrolling feature.
• Dialog:
  • Removed Dialog themeColor option.
• Form:
  • Added EditorTemplateViewFor in FormItemBuilder.
• Gantt:
  • Gantt view selector changed from ButtonGroup to SegmentedControl.
• Grid:
  • Added sticky groups.
  • Added row pinning.
• PDFViewer:
  • PDFViewer Loader overlay class changed from k-overlay-light to k-overlay.
• Scheduler:
  • Scheduler view selector changed from ButtonGroup to SegmentedControl.
• Window:
  • Removed Window themeColor option.

• Avatar:
  • Fixed issue so that Avatar image URL can be escaped.
• Chat:
  • Fixed Chat filesTemplate regression.
• ChipList:
  • Fixed issue where you were unable to prevent ChipList select event.
• ComboBox:
  • Fixed issue where the setOptions method of the ComboBox does not reset the height configuration.
• ContextMenu:
  • Fixed missing class k-menu-group on ContextMenu ul element.
  • Fixed issue where aria-expanded false attribute set to Menu items with no child items unexpectedly.
• DropDownButton:
  • Fixed issue where the DropDownButton API does not expose all configuration options for Popup customization.
• DropDownList:
  • Fixed JS error thrown by adaptive DropDownList on resizing browser from mobile to desktop width.
• Editor:
  • Fixed issue where Editor inside iframe resolves the wrong document object.
  • Fixed issue where export tool message is displayed as a tool title.
  • Fixed issue where Editor formatting creates redundant span element.
  • Fixed issue where Editor closes Source element tags.
• FileManager:
  • Fixed issue where Filemanager filters folders after clearing the search.
• Filter:
  • Fixed issue where using keyboard navigation does not focus elements in main Filter toolbar.
• Gantt:
  • Fixed issue where Gantt events ending on 31st of December are not visible in Month and Year view in Firefox.
• Grid:
  • Fixed issue where Grid CaseSensitiveFiltering is not working with EF database.
  • Fixed issue where a JS error is thrown when initializing an initially hidden stacked-layout Grid.
  • Fixed wrong position of Grid drop clue indicator k-reorder-cue in RTL.
  • Fixed issue where filter expressions are inverted when reopening the column filter menu.
• Menu:
  • Fixed issue where aria-expanded false attribute set to Menu items with no child items unexpectedly.
  • Fixed issue where scrollable menu opens wrong menu on mobile.
• PDFViewer:
  • Fixed PdfViewer table of content.
• PivotGrid:
  • Fixed issue where an ampersand in column values prevents column from expanding.
• PropertyGrid:
  • Fixed issue where PropertyGrid throws JS error because appearance properties are serialized with null values.
• Scheduler:
  • Fixed issue where scrolling Scheduler when dragging events is not possible in RTL Scheduler.
• Signature:
  • Fixed issue when using the Signature in a Wizard the drawing line is being offset.
  • Fixed Kendo Signature span between signature line and pen/mouse cursor.
• Spreadsheet:
  • Fixed issue where you are unable to change Spreadsheet cell format via Format dialog.
  • Fixed issue where you are unable to translate the items in the DropDownButton for the Spreadsheet's sheet tabs.
  • Fixed issue where Spreadsheet filter icons do not respect rowHeight.
• TaskBoard:
  • Fixed issue where TaskBoard tasks cannot be reordered in the same column.
• TimeDurationPicker:
  • Fixed TimeDurationPicker label issues.
• Tooltip:
  • Fixed issue where Tooltip is not recalculating its dimensions when the target text is changed.
• Window:
  • Fixed incomplete typescript definitions for the Window title.

• Common:
  • Introduced WebMCP support, making Telerik UI for Blazor components agent-ready out of the box.
  • Added compatibility with .NET 11 Preview 4.
  • Added new TaskBoard component.
  • Removed the ThemeColor.Dark and ThemeColor.Light usages from Button, Badge, DropDownButton, and SplitButton. Removed ThemeColor from Card, Window, Dialog, and popup edit settings components. Removed OverlayThemeColor from LoaderContainer. The appearance in these scenarios is determined by the active theme stylesheet.
• Dependencies:
  • Updated DPL version to 2026.2.519.
  • Added support for Bootstrap theme version 14.1.0.
  • Added support for Classic theme version 14.1.0.
  • Added support for Default theme version 14.1.0.
  • Added support for Fluent theme version 14.1.0.
  • Added support for Material theme version 14.1.0.
  • Added support for Meridian theme version 14.1.0.
• Button:
  • Added XS size option to button components.
• Chart:
  • Added zoom and drag events.
  • The template syntax with literals is now deprecated, use the name of a JavaScript function that returns the value of the template instead.
• Chat:
  • Added auto scroll threshold.
  • OnLoadMoreMessages StartIndex and EndIndex now contain the full rendered range instead of just the requested page.
• Diagram:
  • Added resizable connections, resize handle offset, pannable scrollbars, connector dragging offset.
  • Added ExportToPdfAsync and ExportToPngAsync public methods.
  • Added draggable connections with drag event lifecycle.
• Grid:
  • Allows setting smartbox mode.
• Notification:
  • Added OnClose event.
• PdfViewer:
  • Allows setting non-numeric value for zoom.
  • The component now uses pdf.js version 5.x.
• QrCode:
  • Added UTF_8_NO_BOM value to QRCodeEncoding enum.
• StockChart:
  • The template syntax with literals is now deprecated, use the name of a JavaScript function that returns the value of the template instead.
• SvgIcon:
  • Added Variant property.
• TabStrip:
  • Added OnTabDrop event.
  • Removed ActiveTabIndex and ActiveTabIndexChanged. Use ActiveTabId and ActiveTabIdChanged instead.

• Common:
  • Fixed to localize hardcoded aria-label strings in components.
• Chat:
  • Suggestions shadow should be visible when scrolling is available.
  • Fixed issue where scroll to bottom button is not removed when having large message that does not fit inside the message list.
• DropDownTree:
  • Fixed to align OnChange event behavior with DropDownList.
• Grid:
  • Fixed nested sticky group header misplacement.
  • Fixed issue where the text flickers during typing in AI assistant.
  • Replaced getAbsoluteElementOffset with getBoundingClientRect for drag-to-select in Window.
• Menu:
  • Fixed issue where Leaf items are not closing popup when HideOn is set to MenuHideEvent.Click.
• Popup:
  • Fixed issue to clear stale bottom/maxHeight styles on reposition for auto-height popups.
  • Shrink width by scrollbar size to prevent horizontal page scroll at viewport edge.
• Scheduler:
  • Use getBoundingClientRect for accurate slot metrics at non-100% OS scale.
  • Fixed issue where increasing the height of the SchedulerResourceGroupHeader cell causes misalignment of the Scheduler cells.
• SplitButton:
  • Fixed to make screen readers read the items.
• TabStrip:
  • Persisted tab should be rendered only upon activating, not when visible changed.
• ToolBar:
  • Fixed to prevent arrow key interception when focused element is input or textarea.

• What's New:
  • Telerik.WinForms.MCP is updated with project conversion tools.
  • Speech-to-Text integration and multiple other enhancements in RadChat.
• Common:
  • The speech-to-text feature inside RadChat requires the WebView2. Ensure that your application includes the Microsoft.Web.WebView2 NuGet package as a dependency in order to use this functionality.
  • The target framework-specific NuGet packages (UI.for.WinForms.AllControls.Net462/Net48/Net80/Net90) will be discontinued starting in Q3 2026. To reference a package containing all controls, use the multi-target Telerik.UI.for.WinForms.AllControls NuGet package instead.
  • Updated Telerik Document Processing Library (DPL) version to 2026.2.519.
  • Updated minimum required Telerik Licensing version to 1.8.2.
• AI:
  • Telerik UI for WinForms Converter (Preview) - new Roslyn-based conversion tools that transform standard Microsoft WinForms code (C# and VB.NET) to Telerik UI for WinForms equivalents. Integrated inside the Telerik.WinForms.MCP that exposes the tools as a guided, AI-driven migration workflow.
• RadChat:
  • Improved input area with multiline text support.
  • Introduced reply functionality for responding to existing messages.
  • Integrated RadSpeechToTextButton for voice-to-text input.
  • Added support for file attachments.
• RadRichTextEditor:
  • Introduced support for the HyperlinkClicked event to be raised when clicking on a hyperlink that points to a bookmark in the document.

• Infrastructure:
  • Removed the DPL AITools dlls from the AllControls NuGet package.
• RadDropDownList:
  • Fixed issue where the AccessibleName property is not respected by the Windows Narrator.

• What's New:
  • Enhanced the RadChat input area by adding the option to attach files and added RadSpeechToTextButton integration. TextMessages now support visualizing attached files.
  • Smart Grid Features allow you to perform various operations via AI prompts, including sorting, grouping, selecting, highlighting, and more.
• Common:
  • The following NuGet packages: Telerik.UI.for.Wpf.462.Xaml, Telerik.UI.for.Wpf.80.Xaml, Telerik.UI.for.Wpf.462 and Telerik.UI.for.Wpf.80, which contained the full distribution, are discontinued with the current release. They are replaced by the new Telerik.UI.for.Wpf.AllControls.Xaml and Telerik.UI.for.Wpf.AllControls. These packages provide the same functionality by consolidating the core distribution components via dependencies. These packages are distributed as part of the Telerik_UI_for_WPF_[version]_NuGet_Separate_Packages_Xaml/NoXaml.
  • Telerik.Windows.Controls.Charting.for.Wpf.Xaml NuGet is no longer produced. The assembly can be consumed from the distribution zipped artifacts.
  • Satellite NuGet packages are no longer produced. The satellite assemblies are included in the Telerik.Windows.Controls NuGet.
  • Removed duplicated NullToVisibilityConverter objects from the Telerik.Windows.Controls.Schedule and Telerik.Windows.Controls.PivotFieldList assemblies.
  • Updated minimum required Telerik Licensing version to 1.8.2.
  • Updated Telerik Document Processing Library (DPL) version to 2026.2.519.
• Chat:
  • Improved input area with multiline text support.
  • Integrated RadSpeechToTextButton for voice-to-text input.
  • Added support for file attachments.
  • Removed the toolbar related properties. Use the RadPromptInput API for commands instead. Added the RadSpeechToTextButton which requires adding the Microsoft.Web.WebView2 NuGet package.
• Docking:
  • Introduced Minimize/Maximize buttons in the ToolWindow element.
• GridView:
  • Smart Grid Features allow you to perform various operations via AI prompts, including sorting, grouping, selecting, highlighting, and more.
• PivotGrid:
  • Added an option for the GenerateExport method to copy the raw data rather than the formatted one.
• RichTextBox:
  • The UpdateViewPort method of the SelectionUILayer class is now virtual, so it can be overridden.
• ScheduleView:
  • Added ActiveViewDefinitionChanged event.
• Spreadsheet:
  • The menu items in the default context menu (WorksheetEditorContextMenu) are now localized.

• BusyIndicator:
  • Fixed issue where setting the BusyContent property to a UI element shows its ToString value instead of the UI element itself.
  • Fixed issue where watermark content is not localized dynamically.
• GridView:
  • Fixed possible performance degradation when using numerous GridViewCheckBox cells.
• PDF Viewer:
  • Fixed issue where images hosted inside multiple Form XObjects are not rendered.
  • Fixed issue where PDF documents get a lot of black/grey images.
• PivotGrid:
  • Fixed wrong localization strings for the Spanish culture for some of the resource keys.
• RichTextBox:
  • Fixed issue where a System.NullReferenceException is thrown when using the Ctrl + Left Mouse Button to select multiple separate text blocks or non-adjacent table cells.
• ScheduleView:
  • Fixed issue where a XamlParseException is raised when opening the dialog to edit the recurrence of an appointment with the NoXaml assemblies.
• Spreadsheet:
  • Fixed issue where the ScreenTip label in the Hyperlink dialog is vertically misaligned to the associated TextBox in the Windows 11 theme.

• PdfProcessing:
  • Fixed a CryptographicException because MD5 not available on Blazor WASM.
  • Fixed issue when exporting Courier New subset results in corrupted document.
  • NetStandard: Fixed missing content due to empty glyph outlines in embedded TrueType font subsets.
• SpreadProcessing:
  • PdfFormatProvider: Fixed NotSupportedException: 'No imaging component suitable to complete this operation was found.'.
  • PdfFormatProvider: Fixed NullReferenceException when exporting PatternFill with PatternType.DiagonalStripe.
  • Fixed slow import for files with a lot of formulas.
• WordsProcessing:
  • HtmlFormatProvider: Fixed issue where styles are not correctly preserved when a bold tag is applied to the same styled element.

• What's New:
  • The output stream is now automatically cleared before exporting, preventing corrupted documents when reusing a stream that already contains data.
  • Document Processing NuGet packages are now published on NuGet.org for easier discovery and consumption.
• Breaking Changes:
  • Removed all obsoleted APIs.
• PdfProcessing:
  • Handled import of documents with missing/invalid rectangle (re) operands.
  • Handled invalid ASCII85Decode filter scenario - PDF streams where the end-of-data marker contains whitespace.
  • Added import-export support for ShadingType 1.
  • Added import-export support for ShadingType 4.
  • Added import-export support for ShadingType 6.
  • Added import-export support for ShadingType 7.
  • Exposed internal GrayColor object.
  • Introduced support for signing multiple Signature fields.
• SpreadProcessing:
  • Cell rotation is now respected when exporting the workbook to PDF.
  • Introduced calculation chain functionality.
• WordsProcessing:
  • Introduced support for the Markdown file format, allowing import/export from/to markdown format.
  • TxtFormatProvider: Introduced support for export of Lists.

• PdfProcessing:
  • Fixed issue where a NullReferenceException is thrown when exporting a document with a Type 3 font with missing/invalid Unicode mapping.
  • PdfStreamWriter: Duplicated page content due to incorrect caching mechanism.
  • PdfStreamWriter: Fixed slow performance during page splitting.
  • SkiaImageFormatProvider: NullReferenceException is thrown when exporting pages containing images with missing optional ColorSpace.
  • Fixed issue where XMP metadata is unescaped during import-export.
  • Fixed issue where document password cannot be resolved when document produced by the library contains a SignatureField.
  • Fixed issue where hidden PDF layers are imported as visible.
  • Fixed issue where an invalid PDF document is exported when inserting a specific Jpeg image with an ICC profile.
  • Fixed issue where a password is asked although Adobe opens the document without one.
• SpreadProcessing:
  • Fixed issue where pasting a range in filtered rows overwrites their content.
  • Fixed issue where formatting string #.##0,00;-#.##0,00;;@ does not hide zero values.
  • Fixed issue where images don't move with cells when a row/column is inserted.
  • Fixed issue when setting value in a cell, certain strings are recognized as dates instead of as text.
• WordsProcessing:
  • Fixed issue where font of a style is changed on RTF import when the font is not explicitly defined in the style, and default character properties ('\defchp') have font defined or \defchp is missing altogether.

• Breaking Changes:
  • Versions R3 2022, R1 2023, R2 2023, and R3 2023 are no longer supported. Existing projects using these versions will be automatically migrated to the latest supported version upon opening.
  • Creating new projects with deprecated versions is no longer possible.

Telerik DevCraft Complete includes the following updates:

• Kendo UI for Angular 2026 Q1 (v23.0.0) - Adds PromptBox component, SmartPasteButton, and improves Grid.
• Kendo UI for jQuery 2026 Q1 (2026.1.212) - Adds AI Smart Paste, PromptBox, and Grid SmartBox tool.
• Kendo UI for Vue 2026 Q1 (v8.0.0) - Enhances grid with virtualization, automatic data processing, and built-in global search.
• KendoReact 2026 Q1 (v14.0.0) - Adds PromptBox, SmartPaste, and CSV export to Grid.
• Telerik Document Processing Libraries 2026 Q1 (2026.1.210) - Adds agentic tools (preview).
• Telerik JustMock 2026 Q1 - Adds GitLab integration, and improves cross-platform application support.
• Telerik Reporting 2026 Q1 (20.0.26.211) - Adds support for inline images in HtmlTextBox, and repeating table group headers.
• Telerik UI for .NET MAUI 2026 Q1 (v13.0.0) - Adds Editor component, and AI-powered grid features.
• Telerik UI for ASP.NET AJAX 2026 Q1 (2026.1.211) - Adds SmartPasteButton component, and RTL support in DropDownTree.
• Telerik UI for ASP.NET Core 2026 Q1 (2026.1.212) - Adds SmartBox to Grid, and new PromptBox and AI Smart Paste components.
• Telerik UI for ASP.NET MVC 2026 Q1 (2026.1.212) - Introduces Grid SmartBox, PromptBox, and SmartPasteButton.
• Telerik UI for Blazor 2026 Q1 (v13.0.0) - Adds DropDownTree, SmartPasteButton, and PromptBox.
• Telerik UI for WinForms 2026 Q1 (2026.1.210) - Adds Speech-to-Text button, and supports transparent images in RadMap.
• Telerik UI for WPF 2026 Q1 (2026.1.211) - Adds JSON syntax highlight, Speech-to-Text button, and enhances RichTextBox.

Telerik DevCraft UI includes the following updates:

• Kendo UI for Angular 2026 Q1 (v23.0.0) - Adds PromptBox component, SmartPasteButton, and improves Grid.
• Kendo UI for jQuery 2026 Q1 (2026.1.212) - Adds AI Smart Paste, PromptBox, and Grid SmartBox tool.
• Kendo UI for Vue 2026 Q1 (v8.0.0) - Enhances grid with virtualization, automatic data processing, and built-in global search.
• KendoReact 2026 Q1 (v14.0.0) - Adds PromptBox, SmartPaste, and CSV export to Grid.
• Telerik Document Processing Libraries 2026 Q1 (2026.1.210) - Adds agentic tools (preview).
• Telerik UI for .NET MAUI 2026 Q1 (v13.0.0) - Adds Editor component, and AI-powered grid features.
• Telerik UI for ASP.NET AJAX 2026 Q1 (2026.1.211) - Adds SmartPasteButton component, and RTL support in DropDownTree.
• Telerik UI for ASP.NET Core 2026 Q1 (2026.1.212) - Adds SmartBox to Grid, and new PromptBox and AI Smart Paste components.
• Telerik UI for ASP.NET MVC 2026 Q1 (2026.1.212) - Introduces Grid SmartBox, PromptBox, and SmartPasteButton.
• Telerik UI for Blazor 2026 Q1 (v13.0.0) - Adds DropDownTree, SmartPasteButton, and PromptBox.
• Telerik UI for WinForms 2026 Q1 (2026.1.210) - Adds Speech-to-Text button, and supports transparent images in RadMap.
• Telerik UI for WPF 2026 Q1 (2026.1.211) - Adds JSON syntax highlight, Speech-to-Text button, and enhances RichTextBox.

Telerik DevCraft Ultimate includes the following updates:

• Kendo UI for Angular 2026 Q1 (v23.0.0) - Adds PromptBox component, SmartPasteButton, and improves Grid.
• Kendo UI for jQuery 2026 Q1 (2026.1.212) - Adds AI Smart Paste, PromptBox, and Grid SmartBox tool.
• Kendo UI for Vue 2026 Q1 (v8.0.0) - Enhances grid with virtualization, automatic data processing, and built-in global search.
• KendoReact 2026 Q1 (v14.0.0) - Adds PromptBox, SmartPaste, and CSV export to Grid.
• Telerik Document Processing Libraries 2026 Q1 (2026.1.210) - Adds agentic tools (preview).
• Telerik JustMock 2026 Q1 - Adds GitLab integration, and improves cross-platform application support.
• Telerik Report Server 2026 Q1 (12.0.26.211) - Enhances HtmlTextBox and paged report layout.
• Telerik Reporting 2026 Q1 (20.0.26.211) - Adds support for inline images in HtmlTextBox, and repeating table group headers.
• Telerik UI for .NET MAUI 2026 Q1 (v13.0.0) - Adds Editor component, and AI-powered grid features.
• Telerik UI for ASP.NET AJAX 2026 Q1 (2026.1.211) - Adds SmartPasteButton component, and RTL support in DropDownTree.
• Telerik UI for ASP.NET Core 2026 Q1 (2026.1.212) - Adds SmartBox to Grid, and new PromptBox and AI Smart Paste components.
• Telerik UI for ASP.NET MVC 2026 Q1 (2026.1.212) - Introduces Grid SmartBox, PromptBox, and SmartPasteButton.
• Telerik UI for Blazor 2026 Q1 (v13.0.0) - Adds DropDownTree, SmartPasteButton, and PromptBox.
• Telerik UI for WinForms 2026 Q1 (2026.1.210) - Adds Speech-to-Text button, and supports transparent images in RadMap.
• Telerik UI for WPF 2026 Q1 (2026.1.211) - Adds JSON syntax highlight, Speech-to-Text button, and enhances RichTextBox.