Today I selected \"Work Items\" as I have a million times before but this time I was met with this error along the top of my \"Team Explorer\" tab:
\"Page
Deleting all files in ComponentModelCache folder worked for me
For Visual Studio 2013: "C:\Users\username\AppData\Local\Microsoft\VisualStudio\12.0\ComponentModelCache"
For Visual Studio 2015: "C:\Users\username\AppData\Local\Microsoft\VisualStudio\14.0\ComponentModelCache"
or
%userprofile%\AppData\Local\Microsoft\VisualStudio\14.0\ComponentModelCache