There is not a clearly property to do this in Child window Silverlight control. But when you disable close button of it, the title bar is also hide.
As code below:
<controls:ChildWindow x:Class=”SilverlightApp.Controls.ItemShowCase”
xmlns=”http://schemas.microsoft.com/winfx/2006/xaml/presentation”
xmlns:x=”http://schemas.microsoft.com/winfx/2006/xaml”
xmlns:controls=”clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls”
Width=”500″ Height=”420″
xmlns:dataFormToolkit=”clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.DataForm.Toolkit”
HasCloseButton=”False”
