Grid面板通常包含多个GridSpliiter对象，然而，可以在一个Grid面板中嵌套另一个Grid面板

<Window x:Class="WpfApplication1.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">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition></ColumnDefinition>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
            <ColumnDefinition></ColumnDefinition>
        </Grid.ColumnDefinitions>

        <Grid Grid.Column="0" VerticalAlignment="Stretch">
            <Grid.RowDefinitions>
                <RowDefinition></RowDefinition>
                <RowDefinition></RowDefinition>
            </Grid.RowDefinitions>

            <Button Margin="3" Grid.Row="0">Top left</Button>
            <Button Margin="3" Grid.Row="1">Bottom left</Button>
        </Grid>
        
        <GridSplitter Grid.Column="1" Width="3" HorizontalAlignment="Center" VerticalAlignment="Stretch" ShowsPreview="False"></GridSplitter>
        
        <Grid Grid.Column="2">
            <Grid.RowDefinitions>
                <RowDefinition></RowDefinition>
                <RowDefinition Height="Auto"></RowDefinition>
                <RowDefinition></RowDefinition>
            </Grid.RowDefinitions>
            
            <Button Grid.Row="0" Margin="3">Top right</Button>
            <Button Grid.Row="2" Margin="3">Buttom right</Button>

            <GridSplitter Grid.Row="1" Height="3" VerticalAlignment="Center" HorizontalAlignment="Stretch" ShowsPreview="False"></GridSplitter>
        </Grid>
    </Grid>
</Window>