public static RectangleF RoundRectangleF(RectangleF rect, DiagramUnit unit)
{
int decimals = Units.DecimalsFromUnit(unit);
return(new RectangleF(Convert.ToSingle(Math.Round(rect.X, decimals)), Convert.ToSingle(Math.Round(rect.Y, decimals)), Convert.ToSingle(Math.Round(rect.Width, decimals)), Convert.ToSingle(Math.Round(rect.Height, decimals))));
}