How can global function exist in C#?

Question

How can global function exist in C# when everything is defined inside a class? I was reading the documentation of OpCodes.Call at MSDN, and was surprised to see the followin

Answer 1

C# does not support all features of MSIL. Global functions is one of them. VB.Net, F#, IronPython or some other language likley to use this and other features that are not generated by C# compiler.