/// <summary>
 ///     取消订阅
 /// </summary>
 /// <param name="channelPrefix"></param>
 public void Unsubscribe(string channelPrefix)
 {
     DoWithRetry(() =>
     {
         if (subcnn == null)
         {
             subcnn = new SERedisConnection(_sectionName, _dbIndex);
         }
         var pub = subcnn.GetSubscriber();
         pub.Unsubscribe(new RedisChannel(channelPrefix, RedisChannel.PatternMode.Auto));
         subcnn.Dispose();
     });
 }