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We have mutable API for rich text string, but the implementation must be immutable. Immutability is required by shared string table, that stores whole rich text as one entry in a dictionary and it's not acceptable to change the stored text. To solve this problem, rich text is mostly a facade that changes immutable text when user calls a mutating method. Property setter IXLRichText.Text didn't call "update-immutable-rich-text" method and thus text wasn't changed. Fixes #2430
jahav added bug triaged This was referenced Jul 22, 2025
This was referenced Jul 31, 2025
This was referenced Nov 20, 2025
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When a property setter
IXLRichString.Text(basically a representation of a rich text run) was called, the enveloping rich textIXLRichTextdidn't change.We have mutable API for rich texts, but the implementation must be immutable. Immutability is required by shared string table that stores whole rich text as one entry in a dictionary. Key in a dictionary must be immutable (keep same hash keys and so on).
To solve this problem,
IXLRichTextis mostly a facade that changes immutable text when user calls a mutating method.Property setter IXLRichText.Text didn't call "update-immutable-rich-text" method and thus text wasn't changed.
My confidence in
RichTextandXLComment(aka. mutable-API-changing-immutable-XLImmutableRichTextadapters) is low and they should be rethought and rewritten andXLFormattedTextprobably deleted. Let's add it to the never-ending pile "should be done".Fixes #2430