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API Proposal: Formula Evaluation Feature

Status: Open.

#1973 In dotnet/Open-XML-SDK;

·mliotta openedon Nov 13, 2025

SpreadsheetDocument.Save() throws OpenXmlPackageException when saving .xlsb file due to unexpected styles.bin content type

Status: Open.

#1972 In dotnet/Open-XML-SDK;

·koviroli openedon Nov 9, 2025

With .NET 10, when opening an document with PNG images and close it, some images have zero size in media folder

needs-repro

Status: Open.

#1970 In dotnet/Open-XML-SDK;

·dandesro71 openedon Nov 4, 2025

"Specified part does not exist in the package." exception thrown when calling DeletePart()

Status: Open.

#1968 In dotnet/Open-XML-SDK;

·mlucero-isw openedon Oct 29, 2025

Use specialized URI type for package spec that is more relaxed than System.Uri

Status: Open.

#1965 In dotnet/Open-XML-SDK;

·twsouthwick openedon Sep 29, 2025

Malformed URIs are not rewritten

Status: Open.

#1962 In dotnet/Open-XML-SDK;

·larrygoldupslide openedon Sep 11, 2025

<code>commentParts</code> should have a capitol <code>C</code>

breaking-change

bug

Status: Open.

Bug

#1958 In dotnet/Open-XML-SDK;

·mikeebowen openedon Aug 8, 2025

· 

v4.0

Bug Report: System.OutOfMemoryException when writing large Excel file

bug

Status: Open.

#1951 In dotnet/Open-XML-SDK;

·sw-ms-hardiksenghani openedon Jul 1, 2025

Remove PivotCacheDynamicArray class

breaking-change

Status: Open.

#1945 In dotnet/Open-XML-SDK;

·mikeebowen openedon Jun 24, 2025

· 

v4.0

Add Feature Extension and List for CT_CustomSheetView and CT_SheetView

breaking-change

Status: Open.

#1943 In dotnet/Open-XML-SDK;

·mikeebowen openedon Jun 24, 2025

· 

v4.0

Bug with Open XML SDK Disposing SpreadsheetDocument

needs-repro

Status: Open.

#1942 In dotnet/Open-XML-SDK;

·JoseAngelSalmeronMorote openedon Jun 24, 2025

The <code>DocumentFormat.OpenXml.Office2010.Drawing.TextMath</code> should not inherit OpenXmlLeafElement

breaking-change

bug

Status: Open.

#1940 In dotnet/Open-XML-SDK;

·lindexi openedon Jun 20, 2025

· 

v4.0