CLR Profiling APIhttp://blogs.msdn.com/yirutang/archive/2005/09/28/475098.aspxI think CLR Profiling API is one of the coolest things in CLR. Here is a nice article I just found on msdn about Whidbey Profiling APIs. Note that Everett Profiling API and Whidbey Profiling API are completely not compatible. You have to explicitly implementen-USCommunityServer 2.1 SP1 (Build: 61025.2)