.cpp file open with notepad

Hello!

i was working on a C++ project ,but suddenly my system crashed !

Now i try to open that project,but Visual studio opens a blank notepad file.

also tried to view code by openin the solution explorer, but VS shows an error message that cannot open file.

if i dont find any solution of this problem i have to start my project from the beginning.

I have VS 2012 on Win8.

Thank you!

verify