fixed error by adding dotnet properties

MultiTerm.Wpf.CustomControl/MultiFormatDataView/MultiFormatDataView.cs

@@ -89,6 +89,23 @@ public class MultiFormatDataView : Control
         set { SetValue(RealizedItemsCountProperty, value); }
     }
 
+    /// <summary>
+    /// .NET Property for ItemLoaded.
+    /// </summary>
+    public bool ItemLoaded
+    {
+        get { return (bool)GetValue(ItemLoadedProperty); }
+        set { SetValue(ItemLoadedProperty, value); }
+    }
+
+    /// <summary>
+    /// .NET Property for ItemUnloaded.
+    /// </summary>
+    public bool ItemUnloaded
+    {
+        get { return (bool)GetValue(ItemUnloadedProperty); }
+        set { SetValue(ItemUnloadedProperty, value); }
+    }
     #endregion
 
     static MultiFormatDataView()

MultiTerm.Wpf.CustomControl/MultiFormatDataView/MultiFormatDataView.xaml

@@ -17,7 +17,8 @@
                         <EventTrigger SourceName="ItemStackPanel" RoutedEvent="Loaded">
                             <BeginStoryboard>
                                 <Storyboard>
-                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ItemStackPanel" Storyboard.TargetProperty="(local:MultiFormatDataView.ItemLoaded)">
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ItemStackPanel" 
+                                                                   Storyboard.TargetProperty="(local:MultiFormatDataView.ItemLoaded)">
                                         <DiscreteObjectKeyFrame KeyTime="0:0:0">
                                             <DiscreteObjectKeyFrame.Value>
                                                 <sys:Boolean>True</sys:Boolean>
@@ -30,7 +31,8 @@
                         <EventTrigger SourceName="ItemStackPanel" RoutedEvent="Unloaded">
                             <BeginStoryboard>
                                 <Storyboard>
-                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ItemStackPanel" Storyboard.TargetProperty="(local:MultiFormatDataView.ItemUnloaded)">
+                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ItemStackPanel" 
+                                                                   Storyboard.TargetProperty="(local:MultiFormatDataView.ItemUnloaded)">
                                         <DiscreteObjectKeyFrame KeyTime="0:0:0">
                                             <DiscreteObjectKeyFrame.Value>
                                                 <sys:Boolean>True</sys:Boolean>