几秒钟后，很快就可以从uwp中的另一个页面获取内容

I have Page1.xaml

我有Page1.xaml

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <StackPanel HorizontalAlignment="Left" Height="720" VerticalAlignment="Top" Width="575">

        <TextBlock Foreground="White" TextWrapping="Wrap" Margin="28,20,31,0" FontSize="14" Height="145">
            <TextBlock.Transitions>
                <TransitionCollection>
                    <EntranceThemeTransition FromHorizontalOffset="400"/>
                </TransitionCollection>
            </TextBlock.Transitions>
            <Run Text="Text 1"/>
        </TextBlock>
    </StackPanel>
</Grid>
<Grid Backgr