Earlier quoted context omitted.
C# is _guided_ by Microsoft. You can join in on the language design if you want[1]. The .NET platform is now completely open source[2]. The compiler (Roslyn), tooling (cli), the runtime (coreclr), and the standard library (corefx) are all listed there, all under the Apache 2.0 license. What's not open source? [1] https://github.com/dotnet/csharplang [2] https://github.com/dotnet/
Ultimately, Microsoft decides the future of C# and what goes into it. That is the big issue for some people.
Or would you prefer committee ownership like JavaScript (EcmaScript)? Maybe something like http://www.ecma-international.org/publications/standards/Ecm...?