<Window x:Class="Main"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="WPF " Height="200" Width="300">
<DockPanel>
<StackPanel DockPanel.Dock="Top" Orientation="Horizontal">
<Button Content="Button 1" Margin="2" />
<Button Content="Button 2" Margin="2" />
<Button Content="Button 3" Margin="2" />
<Button Content="Button 4" Margin="2" />
<Button Content="Button 5" Margin="2" />
</StackPanel>
<StackPanel DockPanel.Dock="Left">
<Button Content="Button A" Margin="2" />
<Button Content="Button B" Margin="2" />
<Button Content="Button C" Margin="2" />
<Button Content="Button D" Margin="2" />
<Button Content="Button E" Margin="2" />
</StackPanel>
<Button Content="Fill Button" />
</DockPanel>
</Window>
| 
