Public Delegate Sub NavigationFailedEventHandler ( _
    sender As Object, _
    e As NavigationFailedEventArgs _
)

public delegate void NavigationFailedEventHandler(
    Object sender,
    NavigationFailedEventArgs e
)

public delegate void NavigationFailedEventHandler(
    Object^ sender, 
    NavigationFailedEventArgs^ e
)

type NavigationFailedEventHandler = 
    delegate of 
        sender:Object * 
        e:NavigationFailedEventArgs -> unit