TreeView 使用 HierarchicalDataTemplate 找不到引用的程序集

http://blog.csdn.net/luminji/article/details/4860887

 

xmlns:windows="clr-namespace:System.Windows;assembly=System.Windows.Controls"  

<windows:HierarchicalDataTemplate x:Key="ChildTemplate" ItemsSource="{Binding Path=ChildTopics}"  >
          <TextBlock FontStyle="Italic" Text="{Binding Path=Title}"  />
    </windows:HierarchicalDataTemplate>