<Window x:Class="WrapPanel.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="300" Width="310">
    <Grid>
        <WrapPanel Orientation="Vertical" HorizontalAlignment="Right"><!--设置流方向为垂直，内部控件的对齐方式是向右-->
            <Button Content="OK" Width="50" Height="50"></Button>
            <Button Content="OK" Width="50" Height="50"></Button>
            <Button Content="OK" Width="50" Height="50"></Button>
            <Button Content="OK" Width="50" Height="50"></Button>
            <Button Content="OK" Width="50" Height="50"></Button>
            <Button Content="OK" Width="50" Height="50"></Button>
            <Button Content="OK" Width="50" Height="50"></Button>
        </WrapPanel>
    </Grid>
</Window>