Need link for "Unicode general category"

In the section "Character Classes"
On this line in the table

\p{ name } Matches any single character in the Unicode general category or named block specified by name.

Needs a link to the 'Unicode general category's for all valid values that can replace 'name'

That _might_ be this page [Character classes in regular expressions](https://docs.microsoft.com/en-us/dotnet/standard/base-types/character-classes-in-regular-expressions#CategoryOrBlock), but it doesn't include the _IsCyrillic_ mentioned on that line in the table, so some are missing.

The reason I'm looking for this, is on the [stack overflow answer here](https://stackoverflow.com/a/30350504/353147), they reference the _Alnum_ which I can't seem to get to compile. I'd like to have the link(s) to all valid values that can replace _name_ in the above Regex class.

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#### Document Details

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* ID: 16d4698e-4220-c422-a554-8a481803d240
* Version Independent ID: f0e3b82a-8d81-ad9e-97fc-efb92f7d0d38
* Content: [Regular Expression Language - Quick Reference](https://docs.microsoft.com/en-us/dotnet/standard/base-types/regular-expression-language-quick-reference)
* Content Source: [docs/standard/base-types/regular-expression-language-quick-reference.md](https://github.com/dotnet/docs/blob/main/docs/standard/base-types/regular-expression-language-quick-reference.md)
* Product: **dotnet-fundamentals**
* GitHub Login: @adegeo
* Microsoft Alias: **adegeo**