<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" WindowTitle="StackPanel Sample"> <StackPanel> <TabControl MinHeight="500" MinWidth="400"> <TabItem Header="StackPanel" IsSelected="true"> <StackPanel> <Border Background="Red" BorderBrush="Black" BorderThickness="1"> <TextBlock Foreground="black" FontSize="12">Stacked Item #1</TextBlock> </Border> <Border Width="400" Background="Blue" BorderBrush="Black" BorderThickness="1"> <TextBlock Foreground="black" FontSize="14">Stacked Item #2</TextBlock> </Border> <Border Background="Yellow" BorderBrush="Black" BorderThickness="1"> <TextBlock Foreground="black" FontSize="16">Stacked Item #3</TextBlock> </Border> <Border Width="200" Background="Green" BorderBrush="Black" BorderThickness="1"> <TextBlock Foreground="black" FontSize="18">Stacked Item #4</TextBlock> </Border> <Border Background="White" BorderBrush="Black" BorderThickness="1"> <TextBlock Foreground="black" FontSize="20">Stacked Item #5</TextBlock> </Border> </StackPanel> </TabItem> </TabControl> </StackPanel> </Page>