diff --git a/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/CollectionGenericObjects/ListGenericObjects.cs b/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/CollectionGenericObjects/ListGenericObjects.cs
index d230653..e0d2fe8 100644
--- a/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/CollectionGenericObjects/ListGenericObjects.cs
+++ b/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/CollectionGenericObjects/ListGenericObjects.cs
@@ -47,38 +47,29 @@ public class ListGenericObjects<T> : ICollectionGenericObjects<T>
 
     public int Insert(T obj, IEqualityComparer<T?>? comparer = null)
     {
+        if (Count == _maxCount) throw new CollectionOverflowException(Count);
         if (comparer != null)
         {
             if (_collection.Contains(obj, comparer))
             {
-                throw new ObjectNotUniqueException();
+                throw new ObjectNotUniqueException(obj);
             }
         }
-        if (Count == _maxCount)
-        {
-            throw new CollectionOverflowException(Count);
-        }
         _collection.Add(obj);
         return Count;
     }
 
     public int Insert(T obj, int position, IEqualityComparer<T?>? comparer = null)
     {
+        if (Count == _maxCount) throw new CollectionOverflowException();
+        if (position >= Count || position < 0) throw new PositionOutOfCollectionException();
         if (comparer != null)
         {
             if (_collection.Contains(obj, comparer))
             {
-                throw new ObjectNotUniqueException();
+                throw new ObjectNotUniqueException(obj);
             }
         }
-        if (Count == _maxCount)
-        {
-            throw new CollectionOverflowException(Count);
-        }
-        if (position >= Count || position < 0)
-        {
-            throw new CollectionOverflowException(Count);
-        }
         _collection.Insert(position, obj);
         return position;
     }
diff --git a/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/CollectionGenericObjects/MassiveGenericObjects.cs b/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/CollectionGenericObjects/MassiveGenericObjects.cs
index 9163ce7..2ed8270 100644
--- a/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/CollectionGenericObjects/MassiveGenericObjects.cs
+++ b/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/CollectionGenericObjects/MassiveGenericObjects.cs
@@ -56,11 +56,11 @@ public class MassiveGenericObjects<T> : ICollectionGenericObjects<T>
     {
         if (comparer != null)
         {
-            foreach (T? item in _collection)
+            foreach (T? i in _collection)
             {
-                if ((comparer as IEqualityComparer<DrawingBase>).Equals(obj as DrawingBase, item as DrawingBase))
+                if (comparer.Equals(i, obj))
                 {
-                    throw new ObjectNotUniqueException();
+                    throw new ObjectNotUniqueException(i);
                 }
             }
         }
@@ -72,15 +72,22 @@ public class MassiveGenericObjects<T> : ICollectionGenericObjects<T>
                 return i;
             }
         }
-
-        throw new CollectionOverflowException(Count);
+        throw new CollectionOverflowException();
     }
 
     public int Insert(T obj, int position, IEqualityComparer<T?>? comparer = null)
     {
-        if (position < 0 || position >= Count)
+        if (position >= Count || position < 0) throw new PositionOutOfCollectionException();
+
+        if (comparer != null)
         {
-            throw new PositionOutOfCollectionException(position);
+            foreach (T? i in _collection)
+            {
+                if (comparer.Equals(i, obj))
+                {
+                    throw new ObjectNotUniqueException(i);
+                }
+            }
         }
 
         if (_collection[position] == null)
@@ -88,28 +95,27 @@ public class MassiveGenericObjects<T> : ICollectionGenericObjects<T>
             _collection[position] = obj;
             return position;
         }
-        else
+        int temp = position + 1;
+        while (temp < Count)
         {
-            for (int i = position + 1; i < Count; i++)
+            if (_collection[temp] == null)
             {
-                if (_collection[i] == null)
-                {
-                    _collection[i] = obj;
-                    return i;
-                }
-            }
-
-            for (int i = 0; i < position; i++)
-            {
-                if (_collection[i] == null)
-                {
-                    _collection[i] = obj;
-                    return i;
-                }
+                _collection[temp] = obj;
+                return temp;
             }
+            ++temp;
         }
-
-        throw new CollectionOverflowException(Count);
+        temp = position - 1;
+        while (temp >= 0)
+        {
+            if (_collection[temp] == null)
+            {
+                _collection[temp] = obj;
+                return temp;
+            }
+            --temp;
+        }
+        throw new CollectionOverflowException();
     }
 
     public T? Remove(int position)
diff --git a/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/Drawings/DrawingSAUEqutables.cs b/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/Drawings/DrawingSAUEqutables.cs
index aad25f4..f803729 100644
--- a/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/Drawings/DrawingSAUEqutables.cs
+++ b/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/Drawings/DrawingSAUEqutables.cs
@@ -16,6 +16,7 @@ public class DrawingSAUEqutables : IEqualityComparer<DrawingBase?>
 
         if (y == null || y.BaseSAU == null) return false;
 
+
         if (x.GetType().Name != y.GetType().Name) return false;
 
         if (x.BaseSAU.Speed != y.BaseSAU.Speed) return false;
diff --git a/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/Exceptions/ObjectNotUniqueException.cs b/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/Exceptions/ObjectNotUniqueException.cs
index 9aee3ee..16709d4 100644
--- a/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/Exceptions/ObjectNotUniqueException.cs
+++ b/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/Exceptions/ObjectNotUniqueException.cs
@@ -7,14 +7,17 @@ using System.Runtime.Serialization;
 
 
 namespace Project_SelfPropelledArtilleryUnit.Exceptions;
-[Serializable]
 
-internal class ObjectNotUniqueException: ApplicationException
+[Serializable]
+public class ObjectNotUniqueException : ApplicationException
 {
     public ObjectNotUniqueException(object i) : base("В коллекции уже есть такой элемент " + i) { }
+
     public ObjectNotUniqueException() : base() { }
+
     public ObjectNotUniqueException(string message) : base(message) { }
-    public ObjectNotUniqueException(string message, Exception exception) : base(message, exception)
-    { }
-    protected ObjectNotUniqueException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+
+    public ObjectNotUniqueException(string message, Exception exception) : base(message, exception) { }
+
+    protected ObjectNotUniqueException(SerializationInfo info, StreamingContext contex) : base(info, contex) { }
 }
diff --git a/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/FormSAUCollection.cs b/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/FormSAUCollection.cs
index 77f90ad..df6ed2c 100644
--- a/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/FormSAUCollection.cs
+++ b/Project_SelfPropelledArtilleryUnit/Project_SelfPropelledArtilleryUnit/FormSAUCollection.cs
@@ -70,6 +70,12 @@ public partial class FormSAUCollection : Form
             MessageBox.Show(ex.Message);
             _logger.LogError("Ошибка: {Message}", ex.Message);
         }
+        catch (ObjectNotUniqueException ex)
+        {
+            MessageBox.Show("В коллекции уже есть такой элемент");
+            _logger.LogError("Ошибка: {Message}", ex.Message);
+        }
+
     }
 
     private void buttonRemoveSAU_Click(object sender, EventArgs e)