textBlock内容更新后，如何让滚动条跟随textBlock的内容自动滚动？

Question

<Window x:Class="test.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525" FontSize="50">
    <Grid>
        <ScrollViewer>
            <TextBlock TextWrapping="Wrap" ScrollViewer.VerticalScrollBarVisibility="Auto">aaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaabbbb bbbbbbbbbbbbbbbbbbb bbbbbbbbcccccccccc ccccdddddddddd ddddddddddd dddddcccccccccccccccccc ccceeeeeeeeeeeeeeeeee eeeeeeeeeeee</TextBlock>
        </ScrollViewer>
           </Grid>
</Window>

Answer 1

我也想问问呢，不过我的是窗体的