<ExtensionAttribute()>
Public Overloads Shared Sub AddHandler( _
   ByVal element As DependencyObject, _
   ByVal routedEvent As RoutedEvent, _
   ByVal handler As Delegate _
) 

Dim element As DependencyObject
Dim routedEvent As RoutedEvent
Dim handler As Delegate
 
DependencyObjectExtensions.AddHandler(element, routedEvent, handler)

[ExtensionAttribute()]
public static void AddHandler( 
   DependencyObject element,
   RoutedEvent routedEvent,
   Delegate handler
)

public procedure AddHandler( 
    element: DependencyObject;
    routedEvent: RoutedEvent;
    handler: Delegate
); static; 

ExtensionAttribute()
public static function AddHandler( 
   element : DependencyObject,
   routedEvent : RoutedEvent,
   handler : Delegate
);

[ExtensionAttribute()]
public: static void AddHandler( 
   DependencyObject* element,
   RoutedEvent* routedEvent,
   Delegate* handler
) 

[ExtensionAttribute()]
public:
static void AddHandler( 
   DependencyObject^ element,
   RoutedEvent^ routedEvent,
   Delegate^ handler
) 

void UXPage1_Loaded(object sender, RoutedEventArgs e)
{
    button1.AddHandler(ISButton.ClickEvent, new RoutedEventHandler(button1_Click));
}

void button1_Click(object sender, RoutedEventArgs e)
{
    MessageBox.Show("Button1 Clicked");
}