Object of type “X” cannot be converted to object of type “X”

Question

(Can\'t believe this hasn\'t already been asked, but I can\'t find a dup)

In Visual Studio with lots of projects, when I first open the solution, I sometime

Answer 1

After trying all of the above, cleaning, rebuilding, removing/re-adding references and editing the designer file - in the end simply closing visual studio and re-opening the project made everything better.

tl;dr

Try switching it off and on again.