Non-generic overload for AddHandler

src/Avalonia.Base/Interactivity/IInteractive.cs

@@ -48,5 +48,15 @@ namespace Avalonia.Interactivity
             var c = (Interactive)i;
             c.AddHandler(routedEvent, handler, routes, handledEventsToo);
         }
+        
+        public static void AddHandler(this IInteractive i,
+            RoutedEvent routedEvent,
+            EventHandler<RoutedEventArgs>? handler,
+            RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
+            bool handledEventsToo = false)
+        {
+            var c = (Interactive)i;
+            c.AddHandler(routedEvent, handler, routes, handledEventsToo);
+        }
     }
 }

src/Avalonia.Base/Interactivity/Interactive.cs

@@ -18,7 +18,7 @@ namespace Avalonia.Interactivity
         /// Gets the interactive parent of the object for bubbling and tunneling events.
         /// </summary>
         IInteractive? IInteractive.InteractiveParent => ((IVisual)this).VisualParent as IInteractive;
-        
+
         /// <summary>
         /// Adds a handler for the specified routed event.
         /// </summary>
@@ -32,6 +32,25 @@ namespace Avalonia.Interactivity
             EventHandler<TEventArgs>? handler,
             RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
             bool handledEventsToo = false) where TEventArgs : RoutedEventArgs
+        {
+            AddHandlerCore(routedEvent, handler, routes, handledEventsToo);
+        }
+        
+        public void AddHandler(
+            RoutedEvent routedEvent,
+            EventHandler<RoutedEventArgs>? handler,
+            RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
+            bool handledEventsToo = false)
+        {
+            AddHandlerCore(routedEvent, handler, routes, handledEventsToo);
+        }
+
+        
+        private void AddHandlerCore<TEventArgs>(
+            RoutedEvent routedEvent,
+            EventHandler<TEventArgs>? handler,
+            RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
+            bool handledEventsToo = false) where TEventArgs : RoutedEventArgs
         {
             routedEvent = routedEvent ?? throw new ArgumentNullException(nameof(routedEvent));
 
@@ -50,6 +69,7 @@ namespace Avalonia.Interactivity
 
             AddEventSubscription(routedEvent, subscription);
         }
+        
 
         /// <summary>
         /// Removes a handler for the specified routed event.