Debugging .NET Framework Source Code

Since the releasing of Source Code for the .NET Framework Libraries, you are now able to debug the .NET Framework source code.

Steps:

1. Open Visual Studio 2008 > Tools > Options > Debugging > General > uncheck "Enable Just My Code" > check "Enable Source Server Support"

2. Go to Tools > Options > Debugging > Symbols > add this symbol file location http://referencesource.microsoft.com/symbols > specify the cache location > check the "Search the above locations only when symbols are loaded manually" option.

3. Fire up debugging > right click the code line you wanted to debug in the call stack > click Load Symbols > click F11 > now you can step into the .NET Framework source code and debug .

Reference:

Configuring Visual Studio to Debug .NET Framework Source Code