Singleton模式

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

namespace Singleton
{
    class Singleton
    {
        private static Singleton instance;

        private Singleton()
        {

        }

        public static Singleton Instance
        {
            get
            {
                if (instance == null)
                {
                    instance = new Singleton();
                }
                return instance;
            }
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Singleton t1 = Singleton.Instance;
            Singleton t2 = Singleton.Instance;
            if (t1 == t2)
            {
                Console.WriteLine("equal");
            }
        }
    }
}