Hi, i use visual studio and i want to know how i can create c projects, there is no any option for c, only for C++

In the project properties you can choose to compile as C or C++.

In the project properties you can choose to compile as C or C++.

that i do is
i create a c++ project and i click "add new item" and i select cpp file but i change extension to c manually...
i dont know if this is right way...

That's another option. Read this.