[laichzeit0]

Because it's Microsoft technologies locked into a Microsoft stack. And before people start chiming in about Mono: Good luck selling that idea in a large bureaucratic enterprise environment. For all the hassle involved you're better off sticking to something that runs on a JVM.

[voltagex_]

That's why I suggested it - the parent said they were already in a MS shop, there'd be significantly less resistance with staying on the same stack.