如何在ItemsSource更新时在后台进行ListView更新，而不是freez UI？

I have a ListView:

我有一个ListView：

 <ListView ItemsSource="{Binding Students, IsAsync=True}">             
     <ListView.View>
         <GridView>
             <!--Some view things -->
         </GridView>
     </ListView.View>
 </ListView>
 <ListView