private void Ellipse_CheckedChanged(object sender, EventArgs e)
{
shapeCreator = new EllipseFabric();
}
private void Triangle_CheckedChanged(object sender, EventArgs e)
{
shapeCreator = new TriangleFabric();
}
private void Square_CheckedChanged(object sender, EventArgs e)
{
shapeCreator = new SquareFabric();
}