GasolineTanker/GasolineTanker/DrawingObjectGasolineTanker.cs

@@ -38,5 +38,32 @@ namespace GasolineTanker
         }
         public string GetInfo() => _gasolineTanker?.GetDataForSave();
         public static IDrawingObject Create(string data) => new DrawingObjectGasolineTanker(data.CreateDrawingGasolineTanker());
+
+        public bool Equals(IDrawingObject? other)
+        {
+            if (other is not DrawingObjectGasolineTanker otherGasolineTanker)
+            {
+                return false;
+            }
+            var entity = ;
+            var otherEntity = otherGasolineTanker.;
+            if (entity.GetType() != otherEntity.GetType() ||
+                entity.Speed != otherEntity.Speed ||
+                entity.Weight != otherEntity.Weight ||
+                entity.BodyColor != otherEntity.BodyColor)
+            {
+                return false;
+            }
+            if (entity is EntityImprovedGasolineTanker entityImprovedGasolineTanker &&
+                otherEntity is EntityImprovedGasolineTanker otherEntityWarmlyShip && (
+                entityImprovedGasolineTanker.BodyColor != otherEntityWarmlyShip.BodyColor ||
+                entityImprovedGasolineTanker.DopColor != otherEntityWarmlyShip.DopColor ||
+                entityImprovedGasolineTanker.BodyKit != otherEntityWarmlyShip.BodyKit))
+            {
+                return false;
+            }
+            return true;
+        }
     }
 }
+}

GasolineTanker/GasolineTanker/IDrawingObject.cs

@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace GasolineTanker
 {
-    internal interface IDrawingObject
+    internal interface IDrawingObject : IEquatable<IDrawingObject>
     {
 		public float Step { get; }
 		void SetObject(int x, int y, int width, int height);