fix

Projects/永冠OPP/WCS.Service/Extensions/DeviceExtension.cs

@@ -808,7 +808,7 @@ namespace WCS.Service.Extensions
         /// <summary>
         /// 所有环穿站台的信息
         /// </summary>
-        public static List<StationLocation> ALLlocations { get; set; }
+        public static List<StationLocation> ALLlocations { get; set; } = new List<StationLocation>();
 
         static StationLocation()
         {