Current possibilities for tracing program flow in C#?

Question

I have used Postsharp a few years ago to trace program flow during execution without needing to manually add trace statements to the method

Answer 1

If you only want this ability at debug time, there's Microsoft IntelliTrace that's a part of Visual Studio 2010 Ultimate, and there's Sergey Vlasov's RunTime Flow. The former makes your program run very slow. Haven't tried the latter.