public XlsxStyle(XlsxFont font, XlsxFill fill, XlsxBorder border, XlsxNumberFormat numberFormat, XlsxAlignment alignment)
{
Font = font;
Fill = fill;
Border = border;
NumberFormat = numberFormat;
Alignment = alignment;
}
public XlsxStyle With(XlsxFill fill) => new XlsxStyle(Font, fill, Border, NumberFormat, Alignment);