IronXL for .NET Releases

Iron SoftwareSpreadsheet Controls.NET
Version 2026.x (Jul 31, 2026)(2)

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

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IronXL for .NET 2026.8.1Jul 31, 2026
Features
  • Updated internal dependencies.
Fixes
  • Fixed AutoSizeColumn incorrectly sizing columns containing DateTime values with localized built-in Excel date formats, preventing clipped (####) date displays.
  • Fixed =-prefixed text being parsed as formulas in Text-formatted cells or when prefixed with ', matching Excel behavior.
IronXL for .NET 2026.6.1May 25, 2026
Features
  • Added support for 40+ modern Excel _xlfn.* functions, improving EvaluateAll() compatibility with Microsoft 365 workbooks.
  • Updated internal dependencies.
IronXL for .NET 2026.5.1Apr 27, 2026
Features
  • Reduced peak memory usage during XLSX loading by 65-80%, improving reliability for large files in constrained environments.
  • Updated internal dependencies.
IronXL for .NET 2026.3.1Mar 1, 2026
Features
  • Updated internal dependencies.
IronXL for .NET 2026.2.1Feb 17, 2026
Features
  • Updated internal dependencies.
IronXL for .NET 2026.1.1Major versionFeb 11, 2026
Features
  • Updated internal dependencies.