support for .NET framework 3.5

Still have bugs

Net35/HandyControl_Net35/Interactivity/RoutedEventTrigger.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Windows;
+
+namespace HandyControl.Interactivity
+{
+    public class RoutedEventTrigger : EventTriggerBase<DependencyObject>
+    {
+        public RoutedEvent RoutedEvent { get; set; }
+
+        protected override void OnAttached()
+        {
+            var behavior = AssociatedObject as Behavior;
+            var associatedElement = AssociatedObject as FrameworkElement;
+            if (behavior != null) associatedElement = ((IAttachedObject)behavior).AssociatedObject as FrameworkElement;
+            if (associatedElement == null) throw new ArgumentException();
+            if (RoutedEvent != null) associatedElement.AddHandler(RoutedEvent, new RoutedEventHandler(OnRoutedEvent));
+        }
+
+        private void OnRoutedEvent(object sender, RoutedEventArgs args)
+        {
+            OnEvent(args);
+        }
+
+        protected override string GetEventName()
+        {
+            return RoutedEvent.Name;
+        }
+    }
+}