PrefOrNullTSource(IEnumerableTSource, Boolean) | Gets the most preferred VCardProperty from a collection of VCardProperty objects and allows to specify whether or not to ignore empty items. |
PrefOrNullTSource(IEnumerableTSource, FuncTSource, Boolean, Boolean) | Gets the most preferred VCardProperty from a collection of VCardProperty objects and allows additional filtering of the items, and to specify whether or not to ignore empty items. |