title: <i: Interaction.Behavior> option is not coming for applying beahviour
body: <p>I have been trying to implement a behavior on a wpf window therefore I have added reference to System.Winodws.Interactivity in my current solution and then wrote the desired behavior. but in order to apply this behavior, I have to write something like this in Windows XAML.</p>
  
  <pre><code>&lt;Window x:Class="WpfApplication5.MainWindow" 
          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
          Title="MainWindow" Height="350" Width="525" 
          xmlns:behav ="clr-namespace:WpfApplication5" 
          xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity;assembly=System.Windows.Interactivity"&gt;
      &lt;Window.Resources&gt;
          &lt;i:Interaction.Behaviors&gt;
              &lt;behav:DialogIconRemoveBehavior&gt;&lt;/behav:DialogIconRemoveBehavior&gt;
          &lt;/i:Interaction.Behaviors&gt;
      &lt;/Window.Resources&gt;
      &lt;Grid&gt;
  
      &lt;/Grid&gt;
  &lt;/Window&gt;
  </code></pre>
  
  <p><strong>but this  is not valid tag because I might have to add reference to any other assembly apart form System.Windows.Interactivity, So, please suggest what else 
  I have to do in order to use  tag in XAML</strong></p>