I have experienced the first major project with a memory leak problem… and how do one get started with Memory leak finding.

It is a tough task and the learning curve is quite steep.

You have to get to know the WinDbg. You can start here: http://blogs.msdn.com/tess/pages/net-debugging-demos-information-and-setup-instructions.aspx

Tess Ferrandez has some very nice “Debugging labs”, well take a look at: http://blogs.msdn.com/tess/

If you have a problem with a memory leak, take a look at his one:

http://blogs.msdn.com/tess/archive/2005/11/25/496899.aspx