add XmlnsPrefix

src/Shared/HandyControlDemo_Shared/UserControl/Styles/RichTextBoxDemoCtl.xaml

@@ -1,10 +1,10 @@
 <UserControl x:Class="HandyControlDemo.UserControl.RichTextBoxDemoCtl"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             xmlns:controls="clr-namespace:HandyControl.Controls;assembly=HandyControl"
+             xmlns:hc="https://handyorg.github.io/handycontrol"
              xmlns:langs="clr-namespace:HandyControlDemo.Properties.Langs"
              Background="{DynamicResource RegionBrush}">
-    <controls:TransitioningContentControl>
+    <hc:TransitioningContentControl>
         <RichTextBox Margin="32" Width="400" Height="300" ScrollViewer.VerticalScrollBarVisibility="Auto">
             <FlowDocument>
                 <Paragraph>
@@ -18,5 +18,5 @@
                 </Paragraph>
             </FlowDocument>
         </RichTextBox>
-    </controls:TransitioningContentControl>
+    </hc:TransitioningContentControl>
 </UserControl>