How can I retrieve a Script?

I accidentally replace my GameManager Script with another with the same name, and I want to recuve My original Script.
I Work on MonoDevelop.
And no, it did not go to Trash.

Bro never go fast when deleting things. I lost my terrainController script which was over 5k lines. I wanted to put my laptop in a meatgrinder and feed it to my fish.