Update strategy were changed

StructureHelperCommon/Models/Shapes/Logics/CircleShapeUpdateStrategy.cs

@@ -11,6 +11,7 @@ namespace StructureHelperCommon.Models.Shapes
     {
         public void Update(ICircleShape targetObject, ICircleShape sourceObject)
         {
+            if (ReferenceEquals(targetObject, sourceObject)) { return; }
             targetObject.Diameter = sourceObject.Diameter;
         }
     }

StructureHelperCommon/Models/Shapes/Logics/LineShapeUpdateStrategy.cs

@@ -13,6 +13,7 @@ namespace StructureHelperCommon.Models.Shapes
         readonly PointShapeUpdateStrategy pointUpdateStrategy = new();
         public void Update(ILineShape targetObject, ILineShape sourceObject)
         {
+            if (ReferenceEquals(targetObject, sourceObject)) { return; }
             pointUpdateStrategy.Update(targetObject.StartPoint, sourceObject.StartPoint);
             pointUpdateStrategy.Update(targetObject.EndPoint, sourceObject.EndPoint);
         }

StructureHelperCommon/Models/Shapes/Logics/PointShapeUpdateStrategy.cs

@@ -13,6 +13,7 @@ namespace StructureHelperCommon.Models.Shapes.Logics
         /// <inheritdoc />
         public void Update(IPoint2D targetObject, IPoint2D sourceObject)
         {
+            if (ReferenceEquals(targetObject, sourceObject)) { return; }
             targetObject.X = sourceObject.X;
             targetObject.Y = sourceObject.Y;
         }

StructureHelperCommon/Models/Shapes/Logics/RectangleShapeUpdateStrategy.cs

@@ -11,6 +11,7 @@ namespace StructureHelperCommon.Models.Shapes
     {
         public void Update(IRectangleShape targetObject, IRectangleShape sourceObject)
         {
+            if (ReferenceEquals(targetObject, sourceObject)) { return; }
             targetObject.Width = sourceObject.Width;
             targetObject.Height = sourceObject.Height;
             targetObject.Angle = sourceObject.Angle;