Fix XML triple slash docs per docs team suggestions

[AdamYoblick]

See feedback in dotnet/dotnet-api-docs#5078 for suggestions.

1. Make the fixes in winforms source
2. Get those changes merged into main
3. Regenerate the XML docs and PR them into the dotnet-api-docs repo
   • See API documentation debt - WinForms #4163 (comment) for instructions on how to do that

[Tanya-Solyanik]

@LeafShi1 @SimonZhao888 @Epica3055 - please review the triple slash comments for instances of empty tags or placeholder strings, for example TBD or To be documented and fill them in or delete as appropriate. Note that for overridden methods doc-comments come from the base class and are not needed unless they mention a behavior change.

[Tanya-Solyanik]

@LeafShi1 @SimonZhao888 @Epica3055 - please review the triple slash comments for instances of empty tags or placeholder strings, for example TBD or To be documented and fill them in or delete as appropriate. Note that for overridden methods doc-comments come from the base class and are not needed unless they mention a behavior change.

[LeafShi1]

@LeafShi1 @SimonZhao888 @Epica3055 - please review the triple slash comments for instances of empty tags or placeholder strings, for example TBD or To be documented and fill them in or delete as appropriate. Note that for overridden methods doc-comments come from the base class and are not needed unless they mention a behavior change.

I didn't find TBD or To be documented characters in the Winform repo, but only found one triple slash comments containing ToDo, do you mean we need to make changes to these.

[Tanya-Solyanik]

No, todo is ok. Thank you for the investigation, I'll close this issue