using (BlockingCollection<int> bc = new BlockingCollection<int>())
  {
    Task.Factory.StartNew(() =>
    {
      for (int i = 0; i < 1000; i++)
      {
        bc.Add(i);
        Thread.Sleep(50); 
      }
 
 
      // Need to do this to keep foreach below from hanging
      bc.CompleteAdding();
    });
 
 
    // Now consume the blocking collection with foreach.
    // Use bc.GetConsumingEnumerable() instead of just bc because the
    // former will block waiting for completion and the latter will
    // simply take a snapshot of the current state of the underlying collection.
    foreach (var item in bc.GetConsumingEnumerable())
    {
      Console.WriteLine(item);
    }
  }

  /// <summary>
  /// BlockingCollection演示消息队列
  /// </summary>
  /// <typeparam name="T"></typeparam>
  public class DemoQueueBlock<T> where T : class
  {
    private static BlockingCollection<T> Colls;
    public DemoQueueBlock()
    {

    }
    public static bool IsComleted() {
      if (Colls != null && Colls.IsCompleted) {
        return true;
      }
      return false;
    }
    public static bool HasEle()
    {
      if (Colls != null && Colls.Count>0)
      {
        return true;
      }
      return false;
    }
    
    public static bool Add(T msg)
    {
      if (Colls == null)
      {
        Colls = new BlockingCollection<T>();
      }
      Colls.Add(msg);
      return true;
    }
    public static T Take()
    {
      if (Colls == null)
      {
        Colls = new BlockingCollection<T>();
      }
      return Colls.Take();
    }
  }

  /// <summary>
  /// 消息体
  /// </summary>
  public class DemoMessage
  {
    public string BusinessType { get; set; }
    public string BusinessId { get; set; }
    public string Body { get; set; }
  }

      //添加元素
      while (true)
      {
        Console.WriteLine("请输入队列");
        var read = Console.ReadLine();
        if (read == "exit")
        {
          return;
        }

        DemoQueueBlock<DemoMessage>.Add(new DemoMessage() { BusinessId = read });
      }

 Task.Factory.StartNew(() =>
      {
        //从队列中取元素。
        while (!DemoQueueBlock<DemoMessage>.IsComleted())
        {
          try
          {
            var m = DemoQueueBlock<DemoMessage>.Take();
           Console.WriteLine("已消费:" + m.BusinessId);
          }
          catch (Exception ex)
          {
            Console.WriteLine(ex.Message);
          }
        }
      });