ChildWindow如何加UserControl.Resources

ChildWindow怎么加UserControl.Resources啊
xaml中加入 <UserControl.Resources>


<UserControl.Resources>
  <local:TimeConverter x:Key="TimeConverter" />
  </UserControl.Resources>


提示错误
The property 'Resources' does not exist on the type 'ChildWindow' in the XML namespace...

------解决方案--------------------
ChildWindow 确定是一个 UserControl ？
------解决方案--------------------
<basics:ChildWindow.Resources> 
<local:TimeConverter x:Key="TimeConverter" />
 </basics:ChildWindow.Resources>

请使用这种形式来写ChildWindow资源。它已经不是UserControl
------解决方案--------------------
<controls:ChildWindow.Resources>
<local:TimeConverter x:Key="TimeConverter" />
</controls:ChildWindow.Resources>
------解决方案--------------------
<controls:ChildWindow.Resources>
<local:TimeConverter x:Key="TimeConverter" />
</controls:ChildWindow.Resources>