void CreateNativeFont(FontFamily family, float emSize, FontStyle style, GraphicsUnit unit, byte gdiCharSet, bool gdiVerticalFont)
{
this.sizeInPoints = ConversionHelpers.GraphicsUnitConversion(unit, GraphicsUnit.Point, 96f, emSize);
this.underLine = 0 != (style & FontStyle.Underline);
this.strikeThrough = 0 != (style & FontStyle.Strikeout);
this.size = emSize;
this.unit = unit;
var size = sizeInPoints * 96f / 72f;
var traits = CTFontSymbolicTraits.None;
traits |= style.IsBold() ? CTFontSymbolicTraits.Bold : 0;
traits |= style.IsItalic() ? CTFontSymbolicTraits.Italic : 0;
this.nativeFont = CTFontWithFamily(family, traits, size);
}