public FrameworkElement FindDescendant( Predicate<FrameworkElement> pred )
Parameters
- pred
 - a predicate of type 
Predicate<FrameworkElement> 
Return Value
a 
FrameworkElement or nullPredicate<FrameworkElement>
public FrameworkElement FindDescendant( Predicate<FrameworkElement> pred )
Predicate<FrameworkElement>FrameworkElement or null