Сравнение объектов

Boats/Boats/DrawingObjectBoat.cs

@@ -32,5 +32,48 @@ namespace Boats
         }
         public string GetInfo() => _boat?.GetDataForSave();
         public static IDrawingObject Create(string data) => new DrawingObjectBoat(data.CreateDrawingBoat());
+
+        public bool Equals(IDrawingObject? other)
+        {
+            if (other == null)
+            {
+                return false;
+            }
+            var otherBoat = other as DrawingObjectBoat;
+            if (otherBoat == null)
+            {
+                return false;
+            }
+            var boat = _boat.Boat;
+            var otherBoatBoat = otherBoat._boat.Boat;
+            if (boat.Speed != otherBoatBoat.Speed)
+            {
+                return false;
+            }
+            if (boat.Weight != otherBoatBoat.Weight)
+            {
+                return false;
+            }
+            if (boat.BodyColor != otherBoatBoat.BodyColor)
+            {
+                return false;
+            }
+            if (boat is EntityCatamaran catamaran && otherBoatBoat is EntityCatamaran otherCatamaran)
+            {
+                if (catamaran.Sail != otherCatamaran.Sail)
+                {
+                    return false;
+                }
+                if (catamaran.Bobbers != otherCatamaran.Bobbers)
+                {
+                    return false;
+                }
+                if (catamaran.DopColor != otherCatamaran.DopColor)
+                {
+                    return false;
+                }
+            }
+            return true;
+        }
     }
 }

Boats/Boats/IDrawingObject.cs

@@ -9,7 +9,7 @@ namespace Boats
     /// <summary>
     /// Интерфейс для работы с объектом, прорисовываемым на форме
     /// </summary>
-    internal interface IDrawingObject
+    internal interface IDrawingObject : IEquatable<IDrawingObject>
     {
         /// <summary>
         /// Шаг перемещения объекта

Boats/Boats/MapWithSetBoatsGeneric.cs

@@ -12,7 +12,7 @@ namespace Boats
     /// <typeparam name="T"></typeparam>
     /// <typeparam name="U"></typeparam>
     internal class MapWithSetBoatsGeneric<T, U>
-        where T : class, IDrawingObject
+        where T : class, IDrawingObject, IEquatable<T>
         where U : AbstractMap
     {
         /// <summary>

Boats/Boats/SetBoatsGeneric.cs

@@ -11,7 +11,7 @@ namespace Boats
     /// </summary>
     /// <typeparam name="T"></typeparam>
     internal class SetBoatsGeneric<T>
-        where T : class
+        where T : class, IEquatable<T>
     {
         /// <summary>
         /// Массив объектов, которые храним
@@ -56,6 +56,11 @@ namespace Boats
         /// <returns></returns>
         public int Insert(T boat, int position)
         {
+            // Проверка на уникальность
+            if (_places.Contains(boat))
+            {
+                throw new ArgumentException($"Объект {boat} уже есть");
+            }
             // Проверка позиции
             if (position < 0 || position >= _maxCount - 1)
                 return -1;