CoreText does not synthesize font styles (italic and bold). This means that if you pick a font that has neither a Bolded or Italicized versions available, CoreText will not create a dynamic font that is merely a slanted version of the font for italic, or a boldened version from the original font. In those cases, if you want to synthesize the font, you could apply a Matrix transformation to slant the font (it will still be wrong, but will look slanted). For bolding, you could stroke the font twice, or manually extend the glyph path.

Namespace: MonoMac.CoreText
Assembly: XamMac (in XamMac.dll)
Assembly Versions: 0.0.0.0