Compare to C# releases:
https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/cs...
Most links take you to a section of the same page, with syntax highlighting and optional light/dark mode on the site. For some features, it doesn't explain the rationale behind the change, it just shows the before/after, which is really all I care about:
https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/cs...