C# 继承

public class Xt
{
	int xx;
	public override string ToString()
	{
		return "what a fine day it is";
	}
}

public sealed Tc
{
	//...
}

  public sealed override string ToString()
        {
            //return base.ToString();
            return "what a fine day iterator is";
        }

namespace ConsoleApplication5
{
    class Program1
    {
        public sealed override string ToString()
        {
            //return base.ToString();
            return "what a fine day iterator is";
        }


        public void print(int x)
        {
            Console.WriteLine("this is int in Program1:{0}",x);
        }
        public virtual void print(string str)
        {
            Console.WriteLine("this is string in Program1:{0}",str);
        }
    
    }


    class Program2 : Program1
    {
        //public override string ToString() //error
        //{
        //    return "funck";
        //}
        public void print(int x)
        {
            Console.WriteLine("this is int in Program2:{0}",x);
        }
        public override void print(string str)
        {
            Console.WriteLine("this is string in Program2:{0}",str);
        }
    }


    class Program
    {
        static void Main(string[] args)
        {
            Program1 A1 = new Program1();
            Program1 A2 = new Program2();
            A1.print(1);
            A1.print("A");


            A2.print(1);
            A2.print("A");


            Program2 B = new Program2();
            B.print(1);
            B.print("A");
            
            
        }
    }
}

C# 继承,布布扣,bubuko.com

C# 继承

原文：http://blog.csdn.net/ddupd/article/details/21659601