public static DoubleCheck Get2()
{
if (singleton == null)
{
Console.WriteLine("进入第一个if");
lock (lockThis)
{
if (singleton == null)
{
Console.WriteLine("进入第二个if");
Thread.Sleep(1000);
singleton = new DoubleCheck();
}
}
}
Console.Write("返回实例!");
return(singleton);
}
public void Test()
{
Thread.Sleep(r.Next(100));
DoubleCheck temp = DoubleCheck.Get2();
}