add PropertyGrid Demo

src/Shared/HandyControlDemo_Shared/UserControl/Controls/PropertyGridDemoCtl.xaml

@@ -1,7 +1,23 @@
 <UserControl x:Class="HandyControlDemo.UserControl.PropertyGridDemoCtl"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             xmlns:userControl="clr-namespace:HandyControlDemo.UserControl"
+             xmlns:hc="https://handyorg.github.io/handycontrol"
+             xmlns:extension="clr-namespace:HandyControlDemo.Tools.Extension"
+             xmlns:langs="clr-namespace:HandyControlDemo.Properties.Langs"
              Background="{DynamicResource RegionBrush}">
-    <userControl:UnderConstruction/>
+    <hc:TransitioningContentControl>
+        <Grid>
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition/>
+                <ColumnDefinition/>
+            </Grid.ColumnDefinitions>
+            <hc:PropertyGrid Width="500" SelectedObject="{Binding ElementName=ButtonDemo}"/>
+            <Border Margin="10" Background="{DynamicResource SecondaryRegionBrush}" Style="{StaticResource BorderRegion}" Grid.Column="1" Width="300">
+                <hc:SimplePanel>
+                    <Button Name="ButtonDemo" VerticalAlignment="Top" HorizontalAlignment="Left" Margin="10" Width="200" Content="{extension:Lang Key={x:Static langs:LangKeys.Button}}"/>
+                </hc:SimplePanel>
+            </Border>
+            <hc:Divider Margin="0,20" Orientation="Vertical" LineStrokeDashArray="2,2" Grid.Column="0" HorizontalAlignment="Right"/>
+        </Grid>
+    </hc:TransitioningContentControl>
 </UserControl>