Configuring Visual Studio to Debug .NET Framework Source Code

1. Turn OFF the "Enable Just My Code" setting


2. 
   Turn ON the "Enable Source Server Support" setting
   
   
   
   • Set the symbol file location to be: http://msdl.microsoft.com/download/symbols
   
   
   • Set a cache location. Make sure this is a location that your account has read/write access to. A good option for this is to place this path somewhere under your user hive (e.g. c:\users\xx\symbols)
   
   
   • Enable the "Search the above locations only when symbols are loaded manually" option.
   
   
   
   


3. Make sure that box labeled ‘Suppress JIT optimization on module load’ is Unchecked