static void Main2(string[] args)
{
Thread p1 = new Thread(() => SingletonUnsafe.GetInstance());
Thread p2 = new Thread(() => SingletonUnsafe.GetInstance());
Thread p3 = new Thread(() => SingletonUnsafe.GetInstance());
Thread p4 = new Thread(() => SingletonUnsafe.GetInstance());
Thread p5 = new Thread(() => SingletonUnsafe.GetInstance());
p1.Start();
p2.Start();
p3.Start();
p4.Start();
p5.Start();
p1.Join();
p2.Join();
p3.Join();
p4.Join();
p5.Join();
/*
* SingletonSimple create x4
* SingletonSimple create x1
* Singleton is dummy created!!!
* SingletonSimple create x3
* Singleton is dummy created!!!
* Singleton is dummy created!!!
* SingletonSimple create x2
* SingletonSimple create x5
* Singleton is dummy created!!!
* Singleton is dummy created!!!
*/
}
public static SingletonUnsafe GetInstance() => _Instance ?? (_Instance = new SingletonUnsafe());
