using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

namespace SingletonPattern

{

class Program

{

static void Main(string[] args)

{

Console.WriteLine("单例模式：");

TestStaticSingleton();

TestLasyInitialSingleton();

TestGenericSingleton();

TestDoubleLockSingleton();

}

private static void TestStaticSingleton()

{

Console.WriteLine("静态变量初始化实例");

Singleton1 singleton1 = Singleton1.Instance();

singleton1.GetInfo();

Console.ReadLine();

}

private static void TestLasyInitialSingleton()

{

Console.WriteLine("延迟初始化实例");

Singleton2 singleton2 = Singleton2.Instance();

singleton2.GetInfo();

singleton2.Reset();

Console.ReadLine();

}

private static void TestDoubleLockSingleton()

{

Console.WriteLine("锁机制确保多线程只产生一个实例");

for (int i = 0; i < 2; i++)

{

Thread thread=new Thread(ExecuteInForeground);

thread.Start();

}

}

private static void ExecuteInForeground()

{

Console.WriteLine("Thread {0}: {1}, Priority {2}",

Thread.CurrentThread.ManagedThreadId,

Thread.CurrentThread.ThreadState,

Thread.CurrentThread.Priority);

Singleton3 singleton3 =Singleton3.Instance();

singleton3.GetInfo();

Console.WriteLine(singleton3.GetHashCode());

}

private static void TestGenericSingleton()

{

Console.WriteLine("泛型单例模式：");

Singleton4 instance = GenericSingleton<Singleton4>.GetInstance();

instance.GetInfo();

var singleton4 = Singleton4.Instance;

singleton4.GetInfo();

Console.ReadLine();

}

}

}