"Downloading public symbols" when debugging MS Test on Visual Studio 2010?

Question

I am using MS Test with Visual Studio 2010 to write unit tests. When I debug the test, it shows a message box as shown below.

Title : Downloading public symbols Message : System.XXXX.dll 

Has anyone else encountered this problem with MS Test on Visual Studio 2010?

This problem does not occur when I run the test. Its the only one when I try to debug a test

Answer 1

This is probably an attempt to break into an exception that is thrown from the .NET platform code.

To cancel removal of an exception in Debug => Exceptions or to disable debugging of frames in Tools => Options => Debugging => Enable Just My Code