Visual J# (pronounced 'jay-sharp') programming language was a transitional language for programmers of Java and Visual J++ languages, so they could use their existing knowledge and applications on .NET Framework. J# worked with Java bytecode as well as source so it could be used to transition applications that used third-party libraries even if their original source code was unavailable. It was developed by the Hyderabad-based Microsoft India Development Center at HITEC City in India.