public Arrow(ILineSegment arrowCoordinates)
{
_arrowCoordinates = arrowCoordinates;
_sprite = new Line();
_sprite.Tag = this;
_sprite.Stroke = new SolidColorBrush(Color.FromArgb(255, 0, 0, 0));
_sprite.StrokeThickness = 2.0;
_sprite.X1 = _arrowCoordinates.PointA.X;
_sprite.Y1 = _arrowCoordinates.PointA.Y;
_sprite.X2 = _arrowCoordinates.PointB.X;
_sprite.Y2 = _arrowCoordinates.PointB.Y;
}