c#danliemosih

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

namespace 打印机
{
   public class print
    {
       private static print instace = null;
       static object ce=new object();
       public static print Instace
       {
           get
           {
               if (instace == null)
               {
                   lock(ce)
                   {
                       if(instace==null)
                       {
                            instace = new print();
                            Console.WriteLine("测试");
                       }
                   }
               }
               return instace;
           }
       }
       public void prints(object msg)
       {
           string x = (string)msg;
           Console.WriteLine(x);
       }

    }

}