Error debugging code in visual studio 2012 - Failed to initialize client proxy: could not connect to

Question

I am having Issues debugging unit tests in visual studio. I can run them fine from test explorer. The issue is that I cannot step into the code and debug. Also, I am able to

Answer 1

This may happen when it takes too long to download debug symbol information from various symbol servers, possibly causing a timeout.

We solved this by going to the menu Debug->Options->Symbols and selecting "Only specified modules". It also makes debugging startup considerably faster.