Find what is writing to the Output window

Question

I am debugging a huge enterprise system with a WCF service and fat windows Winforms client. I am running the whole stack in debug.

Something is writing to the Output window repeatedly during a long running process that I am determined to find. I have added new breakpoints to System.Console.Write, System.Console.WriteLine, System.Diagnostic.Debug.Write and System.Diagnostic.Debug.Write and all hit when other things use them but none are hitting for this.

What other ways of writing to output am I missing?

Answer 1

I found it, I didn't think it could be but a breakpoint found System.Diagnostic.Debug.Print also just writes to output.