Who invented the dot net programming language?

.Net is less a programming language and more of a framework for developing applications. Any language that can be build to target the CLR (Common Language Runtime) can be considered a "dot net" language. Examples include C#, VB.Net, IronRuby, IronPython, and F#. One of the more popular languages, C#, was heavily influenced by Microsoft's Anders Hejlsberg, who was one of the original inventors of the Borland language Delphi.