/// <summary>
 /// 移除客户端
 /// </summary>
 /// <param name="client"></param>
 public static void RemoveClient(AsyncTcpClient client)
 {
     Pool.TryTake(out client);
 }
 /// <summary>
 /// 添加客户端
 /// </summary>
 /// <param name="client"></param>
 public static void AddClient(AsyncTcpClient client)
 {
     Pool.Add(client);
 }