Diagnosing runaway CPU in a .Net production application

Question

Does anyone know of a tool that can help me figure out why we are seeing runaway CPU in a managed app?

What I am not looking for:

Answer 1

A profiler is probably the correct answer here.

If you don't want a "fully fledged profiler" like DotTrace, you might want to try SlimTune. It works fairly well, and is completely free (and open source).