[joneholland]

This isn’t totally accurate.

J++ was an actual JVM implementation, c# ran on the .net runtime that was being developed at the same time for the next generation of Visual Basic. While the languages looked superficially similar, the runtime and base class library is significantly different.

After the sun lawsuit, Microsoft dropped j++ and released j#, which allowed for a weird hybrid of Java but with the .net class library running on the .net runtime. This was short lived because why use this over c#, and has been mostly forgotten to history.