Infragistics Ultimate UI for Windows Forms Releases

InfragisticsUI & Visualization Suites.NET
Version 26.1 (Jun 24, 2026)(4)

Learn what's new across releases, with details of features, enhancements, and resolved issues.

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Infragistics Ultimate UI for Windows Forms 26.1.27Major versionJun 24, 2026
Features
  • NET (Core) Only
    • Replaced BinaryFormatter with new custom Infragistics Serializer - this will be the default serializer for serialization. If the Microsoft Binary Formatter is enabled and your binary data is in the older format, the Microsoft Binary Formatter will still be used for deserialization.
  • Breaking Change
    • The new custom serializer is forward compatible in regards to binary files generated with prior versions of the Ultimate UI for Windows Forms toolset. Files originally generated with the BinaryFormatter can still be read and deserialized using the new serializer. However, the BinaryFormatter used in prior versions does not have the ability to deserialize files generated in the new version
  • New Chart Features
    • Range Bar Series - Added RangeBarSeries to UltraDataChart so you can render low-to-high ranges as horizontal bars by combining a CategoryYAxis with a NumericXAxis.
    • Added the Checkmark marker type to supported chart marker enumerations, including LegendItemBadgeShape.
    • Added a new MarkerSize property to chart series that support markers so you can set the marker width and height to an exact device-independent pixel size. Setting MarkerSize to NaN restores the default template-driven marker size, and the property also applies when using lightweight markers. BubbleSeries continues to use radius-based sizing, so MarkerSize does not override bubble radius values.
Fixes
  • Tree
    • UltraTree is looking for the Infragistics.Win.Design DLL in .NET Core.
  • ToolbarsManager
    • When using inherited Forms, adding a new UltraTab does not serialize the UltraTab object.
  • Schedule
    • UltraWinSchedule - 28-day February fails to generate appointment on the 4th weekday.
  • Grid
    • UltraGrid crashes with AccessViolationException on .NET Framework 4.8.
    • UltraFormattedTextEditor doesn't respect the font size while exporting to Word.
    • The summary row in the UltraGrid is not focusable, and as such is unable to be read by screen-readers like Narrator.
    • High dpi with images do not scale properly.
    • Windows Narrator - Extra Text been added when reading Child Row band of the UltraGrid.
  • ExplorerBar
    • [High DPI] - Image and Font scaling is very inconsistent and incorrect.
  • Combo
    • [Accessibility] [Screen Reader] - UltraCombo doesn't get read by reader with checkbox options.
  • Editors
    • UltraComboEditor narrator doesn't read the selected value.
  • DataChart
    • LegendHighlightingMode property does not work in Windows Forms.
  • Combo
    • Using UltraCombox Extra word "Pane" is being added to accessibility text.
  • GridExcelExporter
    • GridExcelExporter InvalidOperationException error with MaxExcelRowCount data.
  • Map
    • UltraGeographicMap - Gaps between tiles visible during zooming.
  • ToolbarsManager
    • ArgumentOutOfRangeException occurs in UltraToolbarsManager in .NET 10.
    • NullReferenceException in ToolMenuItem.
  • GanttView
    • TimelineVisibleDateTimeRangeChanged events raised after Form has been closed.
  • TextEditor
    • UltraTextEditor shows context menu on right-click edge when unfocused even when ContextMenu and ContextMenuStrip are disabled.
  • AppStyling
    • Button styling is different in Visual Studio 2022 versus Visual Studio 2026 with Office2010Blue .isl.
  • ToolbarsManager
    • Cannot add a Main Menu Bar type of toolbar.
  • NumericEditor
    • UltraNumericEditor fires ValueChanged twice when SpinIncrement is set and in/decrementing with the keyboard.
Infragistics Ultimate UI for Windows Forms 25.2.111Mar 23, 2026
Features
  • Charts
    • Added OthersCategoryBrush and OthersCategoryOutline to DataPieChart.
Fixes
  • Editors
    • UltraDateTimeEditor always select last month and date while changing the year and month respectively.
    • CheckEditor was unable to create a custom style using GlyphInfo.
  • UltraToolbarsManager
    • Context menu does not show up in UI Automation's application tree if setting UIAutomationForCodedUITestingEnabled to false.
    • UltraToolBarsManager ApplicationMenu is not showing in WinForms designer.
  • UltraGrid
    • Grid throws exceptions in summaries columns prior to adding sorted columns with groupby.
  • UltraCombo
    • With UIAutomationForCodedUITestingEnabled set to false the UltraCombo drop-down items are not accessible.
  • UltraDataSource
    • When canceling in the UltraDataSource designer, the layout of Form1.cs (Design) disappears.
  • DataTooltipLayer
    • TitleTextColor is overriden when chart's TitleTextColor is used.
  • Excel
    • Fixed Excel Formula parser - Workbook.Load() throwing a Excel.FormulaParseException.
    • Object's Formulas are not round-tripped - Added Excel support for round tripping the camera tool.
    • Saving a VBA Signed Excel file does not keep a signature/certificate.
  • UltraDataChart
    • AssigningCategoryStyle args.GetItems is null or not working to update items in the fragment series.
  • UltraGanttView
    • TimelineVisibleDateTimeRangeChanged events raised after Form has been closed.