I usually read up on various DevBlogs like:

* https://devblogs.microsoft.com/dotnet/

* https://devblogs.microsoft.com/visualstudio/

* https://devblogs.microsoft.com/dotnet/author/toub/ (for perf improvements by .NET version)

* https://dotnet.microsoft.com/en-us/apps/aspnet (of course!)

But it takes a while to catch-up if you are not keeping up-to-date on what is happening or coding in C#/.NET on a day-to-day basis