Unity crashes after i exit playmode and the play button becomes blue

99238-unity-froze.png
Unity crashes after i exit playmode (press the play button while the game is playing) and the play button becomes blue.
The game is not playing (i am not in playmode).
I can not do anything in the editor and i can not resize the window.
The only way to close unity is to restart the computer.

I commented out a void OnDestroy() with a infinite loop and it solved the problem.
I´m dumb again…