Cannot step into .NET framework source with VS2008 SP1

Question

Somehow my VS2008 SP1 has lost the ability to step into .NET framework sources. I've played around with checkboxes to no end; I've re-deleted the Symbol cache folder a dozen times; and I've tried all kinds of debug symbol servers.

All it does is download some .PDB files, but when I try to select a stack frame in .NET, I always get the message about no source available and "do you want to view disassembly".

What gives?

Added: Web application; Windows Vista Business x32; .NET 3.5 SP1.

Answer 1

I believe your problem is a mismatched version of .Net running on your System compared to the image version in the pdb that downloads from the symbol server. I've had the same problem on 64 bit Vista and Win7. I have yet to find a reference for how to get the assembly to 2.0.5.xxxx as indicated in the instructions. SP1 with all service packs on the two OSs I indacated are show the assemblies at 2.0.0.xxxx

EDIT: Start debugging any app you have and Hit CTRL+ALT+U to get the module list. It shows which assembly in the GAC is being used for the application

I blogged what I think is a better description of the problem. Blog of problem