ASNA's Visual RPG is a first class .NET citizen that produces verifiable .NET assemblies.
ASNA Visual RPG (AVR) for Visual Studio .NET is a .NET-based RPG compiler that is integrated into Microsoft’s Visual Studio .NET. AVR enables RPG programmers to build traditional fat client Windows applications or browser- based Web applications/Web services with a familiar RPG-like syntax. AVR uses Visual Studio .NET’s UI designers, debugger, and deployment tools. Because AVR is based on RPG, its learning curve for existing RPG coders is very low.
See more at http://asna.com/us/products/avr/fact-sheet/