"Polyphonic C#"@en . "Polyphonic C# is an extension of the C# programming language.It includes a new concurrency model in which objects can have both synchronous and asynchronous methods. The language is being developed by Nick Benton, Luca Cardelli and C\u00E9dric Fournet at Microsoft Research.Polyphonic C# is based on the join-calculus developed at INRIA Rocquencourt by C\u00E9dric Fournet et al.Polyphonic C# has been integrated with C\u03C9."@en . . . . . . . .