eah…!!! I found a solution for this terrible error… First of all Thanks for every one who tried to help me… Here’s my solution…
- Right Click on the Solution name
- Click Clean Solution
- Restart Visual Studio
- Goto project Properties >> Build
- Change Configuration to Release
- Start Debugging (F5)
1) , 2)

4) , 5)

Next time keep in mind to keep a recent backup of your project folder.
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