Unicode Vertical Orientation types. https://www.unicode.org/reports/tr50/#vo
public enum VerticalOrientationType : int
Characters which are displayed sideways, rotated 90 degrees clockwise compared to the code charts.
Same as TransformUpright except that, as a fallback, the character can be displayed with the code chart glyph rotated 90 degrees clockwise.
Characters which are not just upright or sideways, but generally require a different glyph than in the code charts when used in vertical texts. In addition, as a fallback, the character can be displayed with the code chart glyph upright.
Characters which are displayed upright, with the same orientation that appears in the code charts.