静态内部类实现单例

public class Singleton
{
private Singleton()
{
}

public static Singleton GetInstance()
{
return ConcreateSingleton.instance;
}

private static class ConcreateSingleton
{
public static Singleton instance = new Singleton();
}
}

静态内部类实现单例

原文：http://www.cnblogs.com/zhshlimi/p/5399732.html