diff --git a/DoubleDeckerBus/DoubleDeckerBus/DrawingObjectBus.cs b/DoubleDeckerBus/DoubleDeckerBus/DrawingObjectBus.cs
index bd5e511..25c0020 100644
--- a/DoubleDeckerBus/DoubleDeckerBus/DrawingObjectBus.cs
+++ b/DoubleDeckerBus/DoubleDeckerBus/DrawingObjectBus.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -8,13 +9,22 @@ namespace DoubleDeckerBus
 {
     internal class DrawingObjectBus : IDrawingObject
     {
-        private DrawingBus _bus = null;
+        public DrawingBus? _bus = null;
 
         public DrawingObjectBus(DrawingBus bus)
         {
             _bus = bus;
         }
 
+        public DrawingBus? Get_bus()
+        {
+            return _bus;
+        }
+
+        public DrawingBus getBus(DrawingBus? _bus) {
+            return _bus;
+        }
+
         public float Step => _bus?.Bus?.Step ?? 0;
 
         public (float Left, float Right, float Top, float Bottom) GetCurrentPosition()
@@ -22,7 +32,7 @@ namespace DoubleDeckerBus
             return _bus?.GetCurrentPosition() ?? default;
         }
 
-        public string GetInfo()
+        public string? GetInfo()
         {
             return _bus?.GetDataForSave();
         }
diff --git a/DoubleDeckerBus/DoubleDeckerBus/FormBusConfig.cs b/DoubleDeckerBus/DoubleDeckerBus/FormBusConfig.cs
index 2c4b4d3..63346bc 100644
--- a/DoubleDeckerBus/DoubleDeckerBus/FormBusConfig.cs
+++ b/DoubleDeckerBus/DoubleDeckerBus/FormBusConfig.cs
@@ -143,7 +143,7 @@ namespace DoubleDeckerBus
         }
 
         private void ButtonAdd_Click(object sender, EventArgs e)
-        {
+        {   
             EventAddBus?.Invoke(_bus);
             Close();
         }
diff --git a/DoubleDeckerBus/DoubleDeckerBus/FormMapWithSetBuses.cs b/DoubleDeckerBus/DoubleDeckerBus/FormMapWithSetBuses.cs
index 779e742..35a549d 100644
--- a/DoubleDeckerBus/DoubleDeckerBus/FormMapWithSetBuses.cs
+++ b/DoubleDeckerBus/DoubleDeckerBus/FormMapWithSetBuses.cs
@@ -60,26 +60,30 @@ namespace DoubleDeckerBus
             var formBusConfig = new FormBusConfig();
             formBusConfig.AddEvent(AddBus);
             formBusConfig.Show();
-           
         }
 
         private void AddBus(DrawingBus bus)
-        {
+        {   
             if (listBoxMaps.SelectedIndex == -1)
             {
                 return;
             }
-            DrawingObjectBus boat = new(bus);
-            if (_mapsCollection[listBoxMaps.SelectedItem?.ToString() ?? string.Empty] + boat >= 0)
+            try
             {
+                DrawingObjectBus _bus = new(bus);
+                _ = _mapsCollection[listBoxMaps.SelectedItem?.ToString() ?? string.Empty] + _bus;
                 MessageBox.Show("Объект добавлен");
                 pictureBox.Image = _mapsCollection[listBoxMaps.SelectedItem?.ToString() ?? string.Empty].ShowSet();
                 _logger.LogInformation($"Объект добавлен");
             }
-            else
+            catch (StorageOverflowException ex)
             {
-                MessageBox.Show("Не удалось добавить объект");
-                _logger.LogInformation($"Объект не добаавлен");
+                MessageBox.Show($"Не удалось добавить объект {ex.Message}");
+                _logger.LogInformation($"Объект не добаавлен {ex.Message}");
+            }
+            catch (Exception ex) {
+                MessageBox.Show($"Не удалось добавить объект {ex.Message}");
+                _logger.LogInformation($"Объект не добаавлен {ex.Message}");
             }
         }
 
diff --git a/DoubleDeckerBus/DoubleDeckerBus/IDrawingObject.cs b/DoubleDeckerBus/DoubleDeckerBus/IDrawingObject.cs
index 93c20a0..2e091e9 100644
--- a/DoubleDeckerBus/DoubleDeckerBus/IDrawingObject.cs
+++ b/DoubleDeckerBus/DoubleDeckerBus/IDrawingObject.cs
@@ -8,6 +8,7 @@ namespace DoubleDeckerBus
 {
     internal interface IDrawingObject
     {
+        public DrawingBus getBus();
         public float Step { get; }
 
         void SetObject(int x, int y, int width, int height);
diff --git a/DoubleDeckerBus/DoubleDeckerBus/MapWithSetBusesGeneric.cs b/DoubleDeckerBus/DoubleDeckerBus/MapWithSetBusesGeneric.cs
index d5513cf..66aed8b 100644
--- a/DoubleDeckerBus/DoubleDeckerBus/MapWithSetBusesGeneric.cs
+++ b/DoubleDeckerBus/DoubleDeckerBus/MapWithSetBusesGeneric.cs
@@ -29,7 +29,7 @@ namespace DoubleDeckerBus
         }
 
         public static int operator +(MapWithSetBusesGeneric<T, U> map, T bus)
-        {
+        {   
             return map._setBuses.Insert(bus);
         }
 
diff --git a/DoubleDeckerBus/DoubleDeckerBus/SetBusesGeneric.cs b/DoubleDeckerBus/DoubleDeckerBus/SetBusesGeneric.cs
index eed9d3e..32625aa 100644
--- a/DoubleDeckerBus/DoubleDeckerBus/SetBusesGeneric.cs
+++ b/DoubleDeckerBus/DoubleDeckerBus/SetBusesGeneric.cs
@@ -7,7 +7,7 @@ using System.Threading.Tasks;
 namespace DoubleDeckerBus
 {
     internal class SetBusesGeneric<T>
-        where T : class
+        where T : IDrawingObject
     {
         private readonly List<T> _places;
 
@@ -29,6 +29,16 @@ namespace DoubleDeckerBus
 
         public int Insert(T bus, int position)
         {
+            try
+            {
+                if (bus.getBus(bus.Get_bus()) == null)
+                {
+                    throw new NullReferenceException();
+                }
+            }
+            catch (NullReferenceException) {
+                MessageBox.Show("null");
+            }
             if (BusyPlaces == _maxCount) {
                 throw new StorageOverflowException(BusyPlaces);
             }
@@ -57,7 +67,7 @@ namespace DoubleDeckerBus
 
         public T this[int position] {
             get {
-                if (position < 0 || position >= _maxCount) return null;
+                if (position < 0 || position >= _maxCount) return default(T);
                 return _places[position];
             }
             set {