By default, Visual Studio won't even tell you that you can't change the file until -- after you've made all your changes, of course -- you try to save the file. Only then do you get the bad news with ...

Despite the file extensions you see in the Add Existing Item dialog box, Visual Studio isn't limited to working with specific kinds of files. If you have some file that you want to include in your ...

With a C++, C#, or Visual Basic solution open in Visual Studio, select File > Add > Existing Project.. In the Open Project dialog box, select All Project Files, if not already selected, in the ...