public void ShowBrushProperties()
{
BrushProperies br = new BrushProperies(SelectedFigure, this);
br.ShowDialog();
AddToHistory();
}
private void buttonChangeBrush_Click(object sender, EventArgs e)
{
BrushProperies brush_prop = new BrushProperies(figure, core);
brush_prop.ShowDialog();
}