title: An item with the same key has already been added in Properties?
body: <p>I upgrade my computer and upgraded to VS2013 (So I believe) and now I get "An item with the same key already has been added. No one else in the same project gets this error and I haven't changed the base code. Whenever I right-click on projects and "General" I get this dialog box. Not sure if there something in my registry or somewhere that I need to delete. I still have VS2008 and VS2010 installed as well. Any help would greatly be appreciated</p>