Gets a value that indicates the distance of the underline from the baseline for the typeface.
Assembly: PresentationCore (in PresentationCore.dll)
The return value is usually negative, to place the underline below the baseline. For example, a return value of -0.1 indicates that the underline position is one-tenth of a font em below the baseline, while a return value of -0.25 indicates that it is one-fourth of a font em below the baseline.
Available since 3.0