[WPF]DockPanel

<Window x:Class="WpfApp4.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp4"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <DockPanel Name="dp1" LastChildFill="False">
        <Border DockPanel.Dock="Top" Background="BurlyWood" Height="70" BorderThickness="5" BorderBrush="Green">
            <TextBlock Text="dock=top"/>
        </Border>
        <Border DockPanel.Dock="Bottom" Background="LightCyan" BorderThickness="2" BorderBrush="red">
            <TextBlock Text="dock=bottom"/>
        </Border>
        <Border DockPanel.Dock="Left" Width="100" Background="LawnGreen" BorderThickness="3" BorderBrush="Blue">
            <TextBlock Text="dock=left" />
        </Border>
        <Border Background="AliceBlue" BorderBrush="Azure" BorderThickness="9">
            <TextBlock Text="dock=" />
        </Border>
        <Border DockPanel.Dock="Bottom" Background="Red" BorderBrush="Yellow" BorderThickness="5">
            <TextBlock Text="dock=bottom2"/>
        </Border>
    </DockPanel>
</Window>