ProjectPlane/ProjectPlane/DrawingObject.cs

@@ -40,6 +40,52 @@ namespace ProjectPlane
         public string GetInfo() => _plane?.GetDataForSave();
         public static IDrawingObject Create(string data) => new DrawingObject(data.CreateDrawingPlane());
 
+        public bool Equals(IDrawingObject? other)
+        {
+            if (other == null)
+            {
+                return false;
+            }
+            var otherPlane = other as DrawingObject;
+            if (otherPlane == null)
+            {
+                return false;
+            }
+            var plane = _plane.Plane;
+            var otherPlanePlane = otherPlane._plane.Plane;
+            if (plane.Speed != otherPlanePlane.Speed)
+            {
+                return false;
+            }
+            if (plane.Weight != otherPlanePlane.Weight)
+            {
+                return false;
+            }
+            if (plane.BodyColor != otherPlanePlane.BodyColor)
+            {
+                return false;
+            }
+            if (plane.GetType() != otherPlanePlane.GetType())
+            {
+                return false;
+            }
+            if (plane is EntityWarPlane advanced && otherPlanePlane is EntityWarPlane otheradvanced)
+            {
+                if (advanced.DopColor != otheradvanced.DopColor)
+                {
+                    return false;
+                }
+                if (advanced.extraCell != otheradvanced.extraCell)
+                {
+                    return false;
+                }
+                if (advanced.SuperTurbine != otheradvanced.SuperTurbine)
+                {
+                    return false;
+                } 
+            }
+            return true;
+        }
     }
 
 }

ProjectPlane/ProjectPlane/IDrawingObject.cs

@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace ProjectPlane
 {
-    internal interface IDrawingObject
+    internal interface IDrawingObject : IEquatable<IDrawingObject>
     {
 		/// <summary>
 		/// Шаг перемещения объекта

ProjectPlane/ProjectPlane/MapWithSetPlanesGeneric.cs

@@ -7,7 +7,7 @@ using System.Threading.Tasks;
 namespace ProjectPlane
 {
     internal class MapWithSetPlanesGeneric <T, U>
-        where T : class, IDrawingObject
+        where T : class, IDrawingObject, IEquatable<T>
         where U : AbstractMap
     {
         /// <summary>

ProjectPlane/ProjectPlane/SetPlanesGeneric.cs

@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace ProjectPlane
 {
-    internal class SetPlanesGeneric<T> where T : class
+    internal class SetPlanesGeneric<T> where T : class, IEquatable<T>
     {
 		/// <summary>
 		/// Список объектов, которые храним
@@ -43,6 +43,8 @@ namespace ProjectPlane
 		/// <returns></returns>
 		public int Insert(T plane, int position)
 		{
+			if (_places.Contains(plane)) throw new ArgumentException("Данный объект уже есть в списке");
+
 			if (position < 0 || position >= _maxCount) throw new StorageOverflowException(_maxCount);
 			_places.Insert(position, plane);
 			return position;