Grasshopper 2.0 converts .Net applications to Java byte codes.

Yes, Grasshopper 2.0 Technology Preview 2 is a plug-in to the Microsoft Visual Studio development environment, which has the support for .NET Framework 2.0.
With the help of this plug-in developers can use C# 2.0, ASP.NET 2.0 controls and generics to develop Web applications and deploy them on Linux and other Java-enabled platforms.
This is achieved by converting the .Net applications to Java byte codes.

Can’t believe this?. Download the Grasshopper 2.0 Technology Preview 2 and try it out.
Are you in need of a related tutorial for doing this?. You can get the tutorial from here.

How to use the Grasshopper 2.0 Technology Preview Tutorial | Download the Grasshopper 2.0 Technology Preview