What profiling tools are available for C#.NET?

Question

Edit: Duplicate of http://stackoverflow.com/questions/3927/what-are-some-good-net-profilers

In a previous life as a C++ developer on Linux, I found the built-in profiler gprof to be very handy for finding the best targets for optimization.

Is there a similar tool available for C# or the .NET CLR in general? What profiling tool options are there and where do I find them?

Answer 1

duplicate of http://stackoverflow.com/questions/3927/what-are-some-good-net-profilers

Answer 2

AQTime is great, but pricey.