When I try to access \"Application.CommonAppDataPath\" i get this error message:
System.Deployment: Store metadata \"CurrentBind\" is not valid
I had exactly the same problem. Thanks to mkale for pointing me in the right direction.
I had installed the Reflector VS Addin a few days ago, and at some point it asked about changing the Just My Code option. I had completely forgotten about it, and have been messing around with this problem for the last two days!
At the same time I also had a problem with FileLoadException - which was reporting in the Fusion log that "WRN: Comparing the assembly name resulted in the mismatch: Revision Number". Initially I got around that problem by setting the assembly version to 1.1.0.0 instead of as 1.1.*.
However, once having set the Just My Code option, all these problems disappeared.