Also TypeScript is supported by IntelliJ family of IDEs.
i love resharper for C#, but it's typescript support is... lacking. Easier (and better intelisense discovery) to use the official VS plugin for Typescript (and comes built into the newer versions of VS)
the new VS 2015 preview uses Roslyn for typescript. honestly I prefer VS 2013 better right now, the VS 2015 preview crashes regularly, plus is missing important extensions (and the Web Essentials plugin for it misses features such as TSLint)