System.Windows.Rect.Offset C# (CSharp) Method

        public void Offset(double offsetX, double offsetY)
        {
            if (this.IsEmpty)
            {
                throw new InvalidOperationException("Rect_CannotCallMethod");
            }
            this._x += offsetX;
            this._y += offsetY;
        }

        protected override void OnRender(DrawingContext drawingContext)
        {
            Rect rect = new Rect(startPoint, endPoint);
            rect.Offset(-0.5d, -0.5d);

            drawingContext.DrawRectangle(fill, stroke, rect);
        }