Brilliant post by Rico Mariani (no wonder he has the job he has). I’ll be using this to track down a perf glitch I have in some software I have written. Having said that I am not certain it is a CLR memory leak – it does some interop to pop a balloon and do some clipboard work which causes the memory utilisation to go out to 20–25MB, but using the CLR allocation profiler I can only account for no more than 3MB.