We are going to use TypeScript in our product, so imagine my disappointment when I realized that IntelliSense is not working for TypeScript files in Visual Studio 2012, despite it should.
I have tried everything I could – played with VS settings, uninstalled and reinstalled TypeScript, ReSharper, whole Visual Studio… Nothing. Finally, I had to reset my Windows and start from scratch. After two full days completely wasted trying to get IntelliSense working, I finally got to the magic point of having fresh Windows, Visual Studio, and TypeScript. Started it all up, and bang – no IntelliSense again! After pulling some hair out, and crying quietly in the corner, I started second round of uninstalling and installing TypeScript, including older version 0.8.2, Web Essentials, resetting VS settings, etc. Same result. Finally I checked my Visual Studio plugins, and, to my surprise, spotted MySQL Tools for Visual Studio extension, despite I did not want to install it in the first place when MySQL was installed earlier. Removed this plugin, and voila, TypeScript IntelliSense at its best!
What is strange, I have tried to install MySQL server and its Connector/.NET at home (although a newer version 126.96.36.199 package), and surely got the unwelcome MySQL Tools for Visual Studio extension with them. But! The TypeScript IntelliSense works nevertheless, despite a completely different picture was observed at work twice. Go figure.
So, if TypeScript’s IntelliSense is not working, I would recommend to remove all extensions, starting from those more exotic (e.g. MySQL, and those less used by wide population) – it might actually repair the thing.