diff --git a/HoistingCrane/HoistingCrane/CranesGenericCollection.cs b/HoistingCrane/HoistingCrane/CranesGenericCollection.cs
index bd24e44..71988fa 100644
--- a/HoistingCrane/HoistingCrane/CranesGenericCollection.cs
+++ b/HoistingCrane/HoistingCrane/CranesGenericCollection.cs
@@ -81,18 +81,18 @@ namespace HoistingCrane.Generics
             int k = _pictureHeight/_placeSizeHeight-1;
             foreach (var crane in _collection.GetCranes())
             {
-                if (crane != null)
+                if (j < 0)
+                {
+                    j += _pictureWidth / _placeSizeWidth;
+                    k--;
+                }
+                obj = crane;
+                if (obj != null)
                 {
-                    if (j < 0)
-                    {
-                        j += _pictureWidth / _placeSizeWidth;
-                        k--;
-                    }
-                    obj = crane;
                     obj.SetPosition(_placeSizeWidth * j, _placeSizeHeight * k);
                     obj.DrawTransport(g);
-                    j--;
                 }
+                j--;
             }
         }
     }
diff --git a/HoistingCrane/HoistingCrane/FormCraneCollection.cs b/HoistingCrane/HoistingCrane/FormCraneCollection.cs
index 3770d11..b58efc4 100644
--- a/HoistingCrane/HoistingCrane/FormCraneCollection.cs
+++ b/HoistingCrane/HoistingCrane/FormCraneCollection.cs
@@ -72,7 +72,7 @@ namespace HoistingCrane
                     var obj = _storage[listBoxStorages.SelectedItem?.ToString() ?? string.Empty];
                     if (obj != null)
                     {
-                        if (obj + crane != 1)
+                        if (obj + crane != -1)
                         {
                             MessageBox.Show("Объект добавлен");
                             pictureBoxCollection.Image = obj.ShowCars();
diff --git a/HoistingCrane/HoistingCrane/SetGeneric.cs b/HoistingCrane/HoistingCrane/SetGeneric.cs
index df483fb..c55f728 100644
--- a/HoistingCrane/HoistingCrane/SetGeneric.cs
+++ b/HoistingCrane/HoistingCrane/SetGeneric.cs
@@ -20,6 +20,8 @@
         /// Добавление объекта в набор
         public int Insert(T crane)
         {
+            if(crane==null)
+                return -1;
             _places.Insert(0, crane);
             return 0;
         }
@@ -33,8 +35,8 @@
         /// Удаление объекта из набора с конкретной позиции
         public bool Remove(int position)
         {
-            if ((position < 0) || (position > _maxCount)) return false;
-            _places.RemoveAt(position);
+            if ((position < 0) || (position > _maxCount)|| (_places[position] == null)) return false;
+            _places[position] = null;
             return true;
         }
         /// Получение объекта из набора по позиции