Update Queue

Src/Asp.Net/SqlSugar/Abstract/SugarProvider/SqlSugarProvider.cs

@@ -886,7 +886,7 @@ namespace SqlSugar
             }
             this.Queues.Add(sql, parsmeters);
         }
-        public QueueList Queues { get =>_Queues??new QueueList(); set => _Queues = value; }
+        public QueueList Queues { get { if (_Queues == null) { _Queues = new QueueList(); } return _Queues; }  set => _Queues = value; }
 
         private T SaveQueuesProvider<T>(bool isTran, Func<string, List<SugarParameter>, T> func)
         {