using System;

using System.Linq;

using System.Collections.Generic;

using System.Reflection;

using Ploeh.AutoFixture;

using Ploeh.AutoFixture.AutoMoq;

using Xunit;

using Moq;

using System.Data;

​

public class Program

{

    public static void Main()

    {

        var t = typeof(IInterfaceWithNewMethod);

        var methods = t.GetMethods().Concat(

                    t.GetInterfaces()

                        .SelectMany(@interface => @interface.GetMethods()));

        foreach(var m in methods)

            Console.WriteLine(m.Name);

    }   

}

​

public interface IBaseInterface

{

    string Method();

}

​

public interface IInterfaceWithNewMethod : IBaseInterface

{

    new string Method();

}