在Win10应用程序中使用两个webview无法查看内容，如果我不给minHeight控制？

Question

以下是代码段： -  在下面的代码中我使用两个Web视图控件并使用自定义属性绑定HTML内容。在这里，我希望Web视图内容应该在没有任何滚动的情况下显示，并根据内容大小自动适合网格。

 <Grid  Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <Grid.Resources>
            <ResourceDictionary>
                <CollectionViewSource x:Name="HtmlSource"/>
            </ResourceDictionary>

        </Grid.Resources>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>

        <StackPanel Background="#fffff0">
        <TextBox x:Name="TxtHtmlInput" Width="800" TextWrapping="Wrap" HorizontalAlignment="Left" Height="250"></TextBox>
            <Button Margin="10,0,0,0" x:Name="COnvert" HorizontalAlignment="Center" Content='HTML TO TEXT' Tapped="COnvert_Tapped"></Button>
        </StackPanel>

        <WebView Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Height="Auto" Width="Auto" ScrollViewer.VerticalScrollMode="Disabled" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled"  x:Name="customWebView" webViewer:MyExtensions.HTML="{Binding Source={StaticResource HtmlSource}, Path=HTML}">
                    </WebView> 

        <Grid Height="Auto" Grid.Row="2" Width="Auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
        <WebView  Height="Auto" Width="Auto" x:Name="customWebView1" webViewer:MyExtensions.HTML="{Binding Source={StaticResource HtmlSource}, Path=HTML}"></WebView>
        </Grid>
    </Grid>