Documentation quality - validating <code> documentation comments

[Meir017]

Is your feature request related to a problem? Please describe the problem.

There is no enforcement on the validity of the <code> xml comment tags

Describe the solution you'd like

We should be able to have a small console-application that parses uses the roslyn-api each of the apire projects and extract the <code> comments and validates they are valid C# syntax and that the snippet is a valid C# program (adding a reference to relevant projects).

Additional context

playwright does something like this and validate their C# comment are valid syntax https://github.com/microsoft/playwright/blob/main/utils/doclint/linting-code-snippets/csharp/Program.cs

originally created at dotnet/aspire#5780