gistfile1.cs

using System;

namespace GenericsTest
{
  class MainClass
	{
		public static void Main(string[] args)
		{
			Console.WriteLine("Hello World!");
		}
	}

	interface IRequest<T>
	{
		IResponse<T> GetResponse();
	}

	interface IResponse<T>
	{
		T GetData();
	}

	class MyRequest : IRequest<string>
	{
		public MyResponse GetResponse()
		{
			return new MyResponse();
		}
	}

	class MyResponse : IResponse<string>
	{
		public string GetData()
		{
			return "abc";
		}
	}
}

/*
Error CS0738: `GenericsTest.MyRequest' does not implement interface member `GenericsTest.IRequest<string>.GetResponse()' and the best implementing candidate `GenericsTest.MyRequest.GetResponse()' return type `GenericsTest.MyResponse' does not match interface member return type `GenericsTest.IResponse<string>' (CS0738) (RandomTest)
*/