v3.2.1

Release Date: (25.08.2026) ^(DMY)

Fixed a bug regarding path handling on reading files. Bug fix provided by yolkin-games
Added tests
Code maintenance

v3.2.0

Release Date: (20.08.2026) ^(DMY)

Added reading of defined names.
Added reading of formula metadata and cached formula values, including cached error results.
Added reading of standalone cell error values.
Improved workbook-part and relationship discovery for more robust XLSX processing.
Tolerant reader mode now skips invalid custom number formats with missing format codes;strict validation continues to reject them.
Improved internal workbook finalization and formula/defined-name resolution.
Added infrastructure for resolving external workbook references through compatibility plug-ins.
Introduced a discovery reader to make the reading process more robust (collect data about all parts in a XLSX file)
Updated readers with the new reader interfaces
Deprecated RelationshipReader (replaced by DiscoveryReader)
Added unit test for discovery
Version bump of NanoXLSX.Core to v3.2.0
Code maintenance

Release Date: (04.05.2026) ^(DMY)

Version bump of NanoXLSX.Core to v3.1.0
Improved reader performance (memory consumption, load time). Reading a workbook should now be up to 3 times faster.

Release Date: (24.04.2026) ^(DMY)

Fixed internal async handling of the workbook reader, to avoid deadlocks in WinForms/WPF projects, when async is not used (regression).
Fixed order of worksheets when manually changed
Added filename to workbook when reading from file

Release Date: (28.02.2026) ^(DMY)

Release Date: 22.01.2026 ^(DMY)

Added reader handling for the Font properties: Font.Outline, Font.Shadow, Font.Condense and Font.Extend
Moved internal interfaces to NanoXLSX.Core (namespace NanoXLSX.Interfaces.Reader)
Changed plug-in handling
Version bump rc.4 to rc.5

Release Date: 04.01.2026 ^(DMY)

Release Date: 27.11.2025 ^(DMY)

Refactoring of several enums from lowercase start to uppercase start for better consistency

Release Date: 25.11.2025 ^(DMY)