C#接口，类，集成

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demo
{
    public abstract class MyBase
    {

    }

    internal class MyClass : MyBase
    {

    }

    public interface IMyBaseInterface
    {

    }

    internal interface IMyBaseInterface2
    {

    }

    internal interface IMyInterface : IMyBaseInterface,IMyBaseInterface2
    {

    }

    internal sealed class MyComplexClass : MyClass,IMyInterface
    {

    }

    class Program
    {

        static void Main(string[] args)
        {
            MyComplexClass myObj = new MyComplexClass();
            Console.WriteLine(myObj.ToString());
            Console.ReadKey();
        }
    }
}

一个namespace可以定义多种类与接口，有意思。