Locomotives/Locomotives/DrawningObjectLocomotive.cs

@@ -32,5 +32,56 @@
         }
         public string GetInfo() => _locomotive?.GetDataForSave();
         public static IDrawningObject Create(string data) => new DrawningObjectLocomotive(data.CreateDrawningLocomotive());
+
+        public bool Equals(IDrawningObject? other)
+        {
+            if (other == null)
+            {
+                return false;
+            }
+            var otherLocomotive = other as DrawningObjectLocomotive;
+            if (otherLocomotive == null)
+            {
+                return false;
+            }
+            var locomotive = _locomotive.Locomotive;
+            var otherLocomotiveLocomotive = otherLocomotive._locomotive.Locomotive;
+            if (locomotive.Speed != otherLocomotiveLocomotive.Speed)
+            {
+                return false;
+            }
+            if (locomotive.Weight != otherLocomotiveLocomotive.Weight)
+            {
+                return false;
+            }
+            if (locomotive.BodyColor != otherLocomotiveLocomotive.BodyColor)
+            {
+                return false;
+            }
+            if (locomotive is EntityWarmlyLocomotive && otherLocomotiveLocomotive is not EntityWarmlyLocomotive)
+            {
+                return false;
+            }
+            if (locomotive is not EntityWarmlyLocomotive && otherLocomotiveLocomotive is EntityWarmlyLocomotive)
+            {
+                return false;
+            }
+            if (locomotive is EntityWarmlyLocomotive warmlyLocomotive && otherLocomotiveLocomotive is EntityWarmlyLocomotive otherWarmlyLocomotive)
+            {
+                if (warmlyLocomotive.AdditionalColor != otherWarmlyLocomotive.AdditionalColor)
+                {
+                    return false;
+                }
+                if (warmlyLocomotive.HasPipe != otherWarmlyLocomotive.HasPipe)
+                {
+                    return false;
+                }
+                if (warmlyLocomotive.HasFuelTank != otherWarmlyLocomotive.HasFuelTank)
+                {
+                    return false;
+                }
+            }
+            return true;
+        }
     }
 }

Locomotives/Locomotives/FormMapWithSetLocomotives.cs

@@ -135,6 +135,11 @@ namespace Locomotives
                     MessageBox.Show("Не удалось добавить объект");
                 }
             }
+            catch (NotUniqueObjectException ex)
+            {
+                MessageBox.Show($"Ошибка добавления: {ex.Message}");
+                _logger.Warning($"Не удалось добавить объект: {ex.Message}");
+            }
             catch (StorageOverflowException ex)
             {
                 MessageBox.Show($"Ошибка добавления: {ex.Message}");

Locomotives/Locomotives/IDrawningObject.cs

@@ -3,7 +3,7 @@
     /// <summary>
     /// Интерфейс для отрисовки
     /// </summary>
-    internal interface IDrawningObject
+    internal interface IDrawningObject : IEquatable<IDrawningObject>
     {
         /// <summary>
         /// Шаг перемещения объекта

Locomotives/Locomotives/MapWithSetLocomotivesGeneric.cs

@@ -1,7 +1,7 @@
 namespace Locomotives
 {
     internal class MapWithSetLocomotivesGeneric<T, U>
-        where T : class, IDrawningObject
+        where T : class, IDrawningObject, IEquatable<T>
         where U : AbstractMap
     {
         /// <summary>

Locomotives/Locomotives/NotUniqueObjectException.cs

@@ -0,0 +1,13 @@
+using System.Runtime.Serialization;
+
+namespace Locomotives
+{
+    [Serializable]
+    internal class NotUniqueObjectException : ApplicationException
+    {
+        public NotUniqueObjectException() : base("Такой объект уже есть в коллекции") { }
+        public NotUniqueObjectException(string message) : base(message) { }
+        public NotUniqueObjectException(string message, Exception Exception) : base(message, Exception) { }
+        protected NotUniqueObjectException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+    }
+}

Locomotives/Locomotives/SetLocomotivesGeneric.cs

@@ -1,7 +1,7 @@
 namespace Locomotives
 {
     internal class SetLocomotivesGeneric<T>
-        where T : class
+        where T : class, IEquatable<T>
     {
         /// <summary>
         /// Список объектов, которые храним
@@ -28,6 +28,13 @@
         /// <returns></returns>
         public int Insert(T locomotive)
         {
+            for (int i = 0; i < _places.Count; i++)
+            {
+                if (locomotive.Equals(_places[i]))
+                {
+                    throw new NotUniqueObjectException();
+                }
+            }
             if (_places.Count == 0)
             {
                 _places.Add(locomotive);