When I right clicked on my using statements in a C# file, the context edit menu, didn’t contain the options for refactoring and “organize usings” and the menu item “F12 Go to definition” was grayed out.

I found the fix at: http://stackoverflow.com/questions/25898616/visual-studio-go-to-definition-disabled-or-gray-out

• Clean your solution
• Close solution
• Remove any [solution].ncb, [solution].suo, [solution].vspscc files
• Reopen solution
• Rebuild solution

Menu options should appear and be enabled.