c#中关于多线程创建对象的示例分享

public class Demo

{        private static Demo _demo = null;        /// <summary>

    /// 构造函数        /// </summary>

    private Demo()

    {

        Console.WriteLine("构造了{0}", GetType().Name);

    }        /// <summary>

    /// 获取该类的唯一实例        /// </summary>

    /// <returns>该类的唯一实例</returns>

    public static Demo GetInstance()

    {            if (_demo == null)

            _demo = new Demo();            return _demo;

    }

}

Demo d1 = null;

Demo d2 = null;                //多线程创建对象实例

var t1 = new Thread(() => { d1 = Demo.GetInstance(); });               

var t2 = new Thread(() => { d2 = Demo.GetInstance(); });

t1.Start();

t2.Start();

Thread.Sleep(1000);//主线程等待子线程执行完成，为d1和d2变量赋值

Console.WriteLine("d1 == d2 {0}", object.ReferenceEquals(d1, d2));

Console.Read();

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

{                   

new Action(() => { Demo.GetInstance(); }).BeginInvoke(null, null);

}

Console.Read();