C# feature request: implement interfaces on anonymous types

Question

I am wondering what it would take to make something like this work:

using System;

class Program
{
    static void Main()
    {
        var f = new IFoo { 
              


        

Answer 1

It requires c# 4, but the opensource framework impromptu interface can fake this out of the box using DLR proxies internally. The performance is good although not as good as if the change you proposed existed.

using ImpromptuInterface.Dynamic;

...

var f = ImpromptuGet.Create(new{ 
                Foo = "foo",
                Print = ReturnVoid.Arguments(() => Console.WriteLine(Foo))
            });