.NET Core: attributes that execute before and after method

Question

In Java, it is possible to use AspectJ for adding behavior before and after executing a method, using method annotations. Since C# Attributes seem to be very similar, I was

Answer 1

Just like with Java and AspectJ, you need separate AoP tooling to inject code like this in .NET.

PostSharp is one such tool, probably the best known. I belive they have support for .NET core since version 5.