TypeScript, the beautiful face of the ugly tapeworm that is JavaScript.  It's the only way to do this stuff.

To add a TypeScript component to a non-TypeScript Visual Studio project, add the following to the end of the project .csproj file (do this in notepad or somesuch; adjust the TypeScript path version accordingly):

Reload the project and away you go.  When you add TypeScript files to your project, you can set their BuildAction properties to TypeScriptCompile, if this doesn't happen automatically.