Questo post mi ricorda una maglietta del team di C++ con su scritto "My compiler compiled yours..." 
Yes, it's true, as Miguel found out at the compiler lab:
Another interesting detail: the new Javascript compiler is written in Visual Basic.NET.
The compiler he's talking about is the Silverlight-based Javascript compiler that we released in Silverlight 1.1. Of course, we're also writing VBx in VB as well, so...
Fonte: Javascript in VB...