public static Singleton2 GetInstance()
{
if (Instance == null)//糟糕代码，多线程不安全
{
Instance = new Singleton2();
}
return(Instance);
}
public static Singleton2 GetInstance2()
{
lock (padlock)//线程安全，但是效率太低
{
if (Instance == null)
{
Instance = new Singleton2();
}
}
return(Instance);
}
