c# 写着玩的，两个Task并发,一个写队列一个读队列的异常情况

  class Program
    {
        class TestEnqueue
        {
        static    Queue<string> str = new Queue<string>();
        public static   void AddEnqueue()
        {
            for (int i = 0; i < 10; i++)
            {
                string s=  i.ToString();
                    Console.WriteLine("Task1 now runing");
                str.Enqueue(s);
             }
         }
        public static void DelEnqueue()
        {
            for (int i = 0; i < 10; i++)
            {
                    //  string s = i.ToString();
                   
                  string s=  str.Dequeue();
                    Console.WriteLine("Task2 now runing：：：："+ s);
                }
        }
        }
        static void Main(string[] args)
        {
            Task t1 = new Task(TestEnqueue.AddEnqueue);
            t1.Start();
            Task t2 = new Task(TestEnqueue.DelEnqueue);
            t2.Start();
            Console.ReadKey();
        }
    }
}