IronXL for .NET Releases
Released: May 25, 2026
Updates in 2026.6.1
Features
- Added support for 40+ modern Excel _xlfn.* functions, improving EvaluateAll() compatibility with Microsoft 365 workbooks.
- Updated internal dependencies.
Released: Apr 27, 2026
Updates in 2026.5.1
Features
- Reduced peak memory usage during XLSX loading by 65-80%, improving reliability for large files in constrained environments.
- Updated internal dependencies.
Released: Mar 1, 2026
Updates in 2026.3.1
Features
- Updated internal dependencies.
Released: Feb 17, 2026
Updates in 2026.2.1
Features
- Updated internal dependencies.
Released: Feb 11, 2026
Updates in 2026.1.1
Features
- Updated internal dependencies.
Released: Dec 26, 2025
Updates in 2025.12.2
Fixes
- Fixed InvalidCastException when loading certain .xls files containing Data Validation records.
Released: Nov 10, 2025
Updates in 2025.11.2
Features
- Updated internal dependencies.
Released: Oct 8, 2025
Updates in 2025.10.4
Fixes
- Fixed an issue where numeric cells were incorrectly detected as DateTime.
- Fixed an issue where data types were corrupted when converting XLSX to the XLS format.
- Fixed an issue where the AutoSizeColumn method overestimated the column width.
Released: Sep 3, 2025
Updates in 2025.9.1
Features
- Updated IronSoftware.System.Drawing to 2025.9.3.
Released: Aug 13, 2025
Updates in 2025.8.3
Features
- Updated IronSoftware.System.Drawing to 2025.8.1.
