Singleton模式的实现方式 C#

单例模式标准写法 （注意volatile不能少掉)：

public sealed class Singleton{    static <span style="color:#ff0000;">volatile </span>Singleton instance=null;    static readonly object padlock = new object();    Singleton()    {    }    public static Singleton Instance    {        get        {            if (instance==null)            {                lock (padlock)                {                    if (instance==null)                    {                        instance = new Singleton();                    }                }            }            return instance;        }    }}

http://www.yoda.arachsys.com/csharp/singleton.html

http://stackoverflow.com/questions/1964731/the-need-for-volatile-modifier-in-double-checked-locking-in-net