v3.2.1

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Release Date: (25.08.2026) ^(DMY)

• Fixed a bug regarding path handling on writing files
• Added tests
• Code maintenance

v3.2.0

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Release Date: (20.08.2026) ^(DMY)

• Added writing of defined names.
• Added writing of extended formula metadata and cached formula values.
• Added writing of cell error values.
• Updated internal writer processing and package-part handling.
• Added infrastructure for writing external workbook references through compatibility plug-ins.
• Version bump of NanoXLSX.Core to v3.2.0
• Implemented writing of defined names (cell references)
• Code maintenance

v3.1.0

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Release Date: (04.05.2026) ^(DMY)

• Version bump of NanoXLSX.Core to v3.1.0
• Optimized writer performance (memory consumption, save time)
• Updated internal worksheet iteration to use Worksheet.CellValues, eliminating per-cell string allocation during save. Requires NanoXLSX.Core ≥ 3.1.0.

v3.0.0

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Release Date: (28.02.2026) ^(DMY)

• Final release of NanoXLSX.Writer
• See the main changelog for a comprehensive summary of all changes since v2.6.7

v3.0.0-rc.4 + v3.0.0-rc.5

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Release Date: 22.01.2026 ^(DMY)

• Added writer handling for the Font properties: Font.Outline, Font.Shadow, Font.Condense and Font.Extend
• Moved internal interfaces to NanoXLSX.Core (namespace NanoXLSX.Interfaces.Writer)
• Version bump rc.4 to rc.5

v3.0.0-rc.3

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Release Date: 04.01.2026 ^(DMY)

• Changed handling of colors in the style writer (Fills) to consider:
  • sRGB colors (RGB / ARGB)
  • Indexed colors
  • Theme colors
  • System colors
  • Auto colors
  • Tint values
• Internal change of structured text handling

v3.0.0-rc.2

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Release Date: 27.11.2025 ^(DMY)

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

v3.0.0-rc.1

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Release Date: 25.11.2025 ^(DMY)

• Initial release of the writer library