Visual Studio is perfectly willing to work with any file that you want to add to your solution -- you just have to tell it what editor to use.

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 ...

Microsoft's Craig Wittenberg has revived the original File Manager that first came with Windows 3.0 in 1990, getting it to run on Windows 10 and making it available as a Visual Studio solution.