How to trace inside WPF source code !! FOUND IT..

How to trace inside WPF? Thank God I found the solution posted by Shawn Burke - MSFT
Thank you Shawn :)

And these links too:
http://referencesource.microsoft.com/serversetup.aspx
http://weblogs.asp.net/rajbk/archive/2010/04/21/setting-up-visual-studio-2010-to-step-into-microsoft-net-source-code.aspx

If non of the above worked (... just like what happened with me..), try this one. You can download .Net Framework source code :) .. isn't this neat. Here:
http://www.codeproject.com/Articles/93423/Step-Into-NET-Framework-4-0-Source-Code
Thanks Arik Poznanski :)

But no.. not even this worked .. I guess I still have DLLs that do not have source code of the same version.. But hey, look at the bright side.. I have the source code now.. And I can use the features and tricks provided by links the above. Especially Tracing into properties and filling the Call Stack frame with external assemblies' calls.. providing me with objects' names and methods' names. So I can look them up from the Source Code and figure out the problem that I am having.