This is so annoying. I'm using Visual Studio 2005, and for some reason I cannot set breakpoints to do my debugging. I tried several suggestions I can find from the net but still it doesn't work. Since I don't know the solution yet, but will expand this writeup once I figure out. But for me to debug on my ASP.NET Project right now, I added the following in my code. Important thing for me now is to debug my project.
System.Diagnostics.Debugger.Break(); // DEBUG