using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace weizhi
{
    class Program
    {
        static void Main(string[] args)
        {
            int[,]s1 = new int[,]{{45,23},{1,2},{8,9}};
            int[,]s2 = new int[,]{{ 4,23},{10,20},{7,9}};
            int i,j;
            string output="";
            foreach (int a in s1)
            {
                for(i=0;i<4;++i)
                    for (j = 0; j < 2; ++j)
                    {
                        if (a == s2[i,j])
                            goto done;
                    }
                done: output += string.Format("找到{0}位置[{1}][{2}]")+"\n";
                output+=string.Format("没有找到{0}位置[{1}][{2}]");
                MessageBox.Show(output);



                    
            

 
 
            }
        }
    }
}

谢谢！