Here's a bug that lived in .NET for over four years As in: Reported over 4 years ago. If your BackgroundService threw an exception after its first await, your host would catch it, log a critical message, and then exit cleanly with exit code 0.
So everyone would think it terminated successfully. That got fixed!
Microsoft.Extensions.Configuration has had ConfigurationKeyNameAttribute since .NET 6 which it lets you rename the key a property maps to. But there was never an official way to say "don't bind this property at all." That gap is finally closed in .NET 11 with ConfigurationIgnoreAttribute.
We have Join. We have LeftJoin. We have RightJoin. But somehow we still don't have a proper full outer join in LINQ. That might come soon!
Some time back I wrote about "async2 - The .NET Runtime Async experiment concludes" basically moving the async state machine into the runtime. Now with .NET 11 we are seeing the fruits of that labor.
New helper will be available with .NET 11: MediaTypeMap.GetMediaType and MediaTypeMap.GetExtension which makes the web-development a bit easier!