SharpKit has a 3+ year head-start selling and supporting their solution (available commercially and under GPL3). I have no doubt they have considered transition

SharpKit has a 3+ year head-start selling and supporting their solution (available commercially and under GPL3). I have no doubt they have considered transitioning to Roslyn as well; it is a tough decision for all those who had already built a C# parser. (Note that those using Mono [Saltarelle for sure] will wind up stuck unless they follow along to Roslyn.) The biggest part of these projects is the re-implementation of the .NET CLR in JavaScript (for example, Saltarelle began life using the Script# runtime with a few tweaks). The more production usage the runtime has seen, the more useful the translation tool becomes! http://sharpkit.net/ http://sharpkit.net/