Radwindow可以套用模板，可以套用ASPX页面
xmlns:nav="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation"
<nav:RadWindow x:Name="radWindow1" WindowStartupLocation="CenterScreen">
<StackPanel>
<nav:RadMenu VerticalAlignment="Top">
<nav:RadMenuItem Header="File">
<nav:RadMenuItem Header="New">
<nav:RadMenuItem Header="Project" />
<nav:RadMenuItem Header="Web Site" />
</nav:RadMenuItem>
<nav:RadMenuItem Header="Open">
<nav:RadMenuItem Header="File" />
<nav:RadMenuItem Header="Web Site" />
</nav:RadMenuItem>
<nav:RadSeparator />
<nav:RadMenuItem Header="Add">
<nav:RadMenuItem Header="New Project" />
<nav:RadMenuItem Header="New Web Site" />
</nav:RadMenuItem>
<nav:RadSeparator />
<nav:RadMenuItem Header="Close" />
</nav:RadMenuItem>
<nav:RadMenuItem Header="Edit">
<nav:RadMenuItem Header="Undo" />
<nav:RadMenuItem Header="Redo" />
<nav:RadSeparator />
<nav:RadMenuItem Header="Cut" />
<nav:RadMenuItem Header="Copy" />
<nav:RadMenuItem Header="Paste" />
<nav:RadMenuItem Header="Delete" />
</nav:RadMenuItem>
<nav:RadMenuItem Header="View">
<nav:RadMenuItem Header="Code" />
<nav:RadMenuItem Header="Designer" />
<nav:RadSeparator />
<nav:RadMenuItem Header="Server Explorer" />
<nav:RadMenuItem Header="Solution Explorer" />
<nav:RadMenuItem Header="Team Explorer" />
</nav:RadMenuItem>
</nav:RadMenu>
<input:RadComboBox>
<input:RadComboBoxItem Content="1" />
<input:RadComboBoxItem Content="2" />
<input:RadComboBoxItem Content="3" />
<input:RadComboBoxItem Content="4" />
<input:RadComboBoxItem Content="5" />
<input:RadComboBoxItem Content="6" />
</input:RadComboBox>
<nav:RadMenu VerticalAlignment="Top" ClickToOpen="True">
<nav:RadMenuItem Header="File">
<nav:RadMenuItem Header="New">
<nav:RadMenuItem Header="Project" />
<nav:RadMenuItem Header="Web Site" />
</nav:RadMenuItem>
<nav:RadMenuItem Header="Open">
<nav:RadMenuItem Header="File" />
<nav:RadMenuItem Header="Web Site" />
</nav:RadMenuItem>
<nav:RadSeparator />
<nav:RadMenuItem Header="Add">
<nav:RadMenuItem Header="New Project" />
<nav:RadMenuItem Header="New Web Site" />
</nav:RadMenuItem>
<nav:RadSeparator />
<nav:RadMenuItem Header="Close" />
</nav:RadMenuItem>
<nav:RadMenuItem Header="Edit">
<nav:RadMenuItem Header="Undo" />
<nav:RadMenuItem Header="Redo" />
<nav:RadSeparator />
<nav:RadMenuItem Header="Cut" />
<nav:RadMenuItem Header="Copy" />
<nav:RadMenuItem Header="Paste" />
<nav:RadMenuItem Header="Delete" />
</nav:RadMenuItem>
<nav:RadMenuItem Header="View">
<nav:RadMenuItem Header="Code" />
<nav:RadMenuItem Header="Designer" />
<nav:RadSeparator />
<nav:RadMenuItem Header="Server Explorer" />
<nav:RadMenuItem Header="Solution Explorer" />
<nav:RadMenuItem Header="Team Explorer" />
</nav:RadMenuItem>
</nav:RadMenu>
</StackPanel>
</nav:RadWindow>