diff --git a/AirPlaneWithRadar/AirPlaneWithRadar/MapsCollection.cs b/AirPlaneWithRadar/AirPlaneWithRadar/MapsCollection.cs
index 74bac1e..6b49008 100644
--- a/AirPlaneWithRadar/AirPlaneWithRadar/MapsCollection.cs
+++ b/AirPlaneWithRadar/AirPlaneWithRadar/MapsCollection.cs
@@ -26,16 +26,15 @@ namespace AirPlaneWithRadar
         public void AddMap(string name, AbstractMap map)
         {
             
-            Keys.Add(name);
+           if (_mapStorages.ContainsKey(name))
+                return;
             _mapStorages.Add(name, new MapWithSetPlainGeneric<DrawingObjectPlane, AbstractMap>(_pictureWidth, _pictureHeight, map));
 
         }
 
         public void DelMap(string name)
         {
-            if (!_mapStorages.ContainsKey(name))
-                return;
-            Keys.Remove(name);
+         
             _mapStorages.Remove(name);
         }