add Recommendation

src/Shared/HandyControlDemo_Shared/UserControl/Main/ContributorsView.xaml

@@ -7,7 +7,7 @@
     <ListBox Background="{DynamicResource GitHubDrawingBrush}" ItemContainerStyle="{StaticResource ListBoxItemCustom}" BorderThickness="0" ItemsSource="{Binding DataList}" ItemsPanel="{StaticResource FluidMoveBehaviorWrapPanelItemsPanelTemplate}">
         <ListBox.ItemTemplate>
             <DataTemplate>
-                <userControl:Avatar UserName="{Binding UserName}" Link="{Binding Link}" Source="{Binding AvatarUri}"/>
+                <userControl:Avatar DisplayName="{Binding DisplayName}" Link="{Binding Link}" Source="{Binding AvatarUri}"/>
             </DataTemplate>
         </ListBox.ItemTemplate>
     </ListBox>