DuckSharp

DuckSharp is a duck-typing library for C#. This allows you to specify that classes implement interfaces at runtime, allowing you to use them in way previously unexpected.

Let's say that you have an interface of String-like things with ToUpper() and ToLower()

public interface IStringLike {
  String ToUpper();
  String ToLower();
}

If I wanted to pass a String in, I'd be out of luck. DuckSharp changes that. At runtime I can build a wrapper around String that appears to implement IStringLike, allowing me to use a String in places I might not be able to otherwise.

String HelloWorld = "Hello World";
IStringLike LikeHelloWorld = DuckProxy.Create(HelloWorld, typeof(IStringLike));

The library is even smart enough to recognize when DuckProxy wrappers need to be added or removed.

public interface ISpeech {}

public interface IPirate {
  ISpeech Talk();
}

public class Ninja {
  String Talk() {
    // ...
  }
}

ISpeech Speech = DuckProxy.Create(new Ninja(), typeof(IPirate)).Talk();