UWP - Viewbox stretch example

MainPage.xaml

<Page
    x:Class="UniversalAppTutorials.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:UniversalAppTutorials"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">
    <StackPanel 
        x:Name="StackPanel1" 
        Margin="50" 
        Orientation="Vertical"
        Background="AliceBlue"
        Padding="50"
        >
        <!---
            Stretch
                Fill 
                    The content is resized to fill the destination dimensions.
                    The aspect ratio is not preserved.
                
                None 
                    The content preserves its original size.
                
                Uniform 
                    The content is resized to fit in the destination
                    dimensions while it preserves its native aspect ratio.
                    It is the default setting of Stretch.
                
                UniformToFill 
                    The content is resized to fill the destination dimensions while
                    it preserves its native aspect ratio. If the aspect ratio of the
                    destination rectangle differs from the source, the source
                    content is clipped to fit in the destination dimensions.
        -->
        <Viewbox MaxWidth="300" MaxHeight="100" Stretch="Fill" Margin="10">
            <Button Content="Stretch Fill"/>
        </Viewbox>
        <Viewbox MaxWidth="300" MaxHeight="100" Stretch="None" Margin="10">
            <Button Content="Strecth None"/>
        </Viewbox>
        <Viewbox MaxWidth="300" MaxHeight="100" Stretch="Uniform" Margin="10">
            <Button Content="Stretch Uniform"/>
        </Viewbox>
        <Viewbox MaxWidth="300" MaxHeight="100" Stretch="UniformToFill" Margin="10">
            <Button Content="UniformToFill"/>
        </Viewbox>
    </StackPanel>
</Page>
MainPage.xaml.cs

using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Media;


namespace UniversalAppTutorials
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            // Initialize a new Viewbox instance
            Viewbox viewbox = new Viewbox();

            // Set the Viewbox maximum width and height
            // This will resize the inside content
            viewbox.MaxWidth = 300;
            viewbox.MaxHeight = 100;

            // Set the margin of Viewbox
            viewbox.Margin = new Thickness(10);

            // Set the Viewbox Stretch programmatically
            viewbox.Stretch = Stretch.Fill;

            // Set the Viewbox Stretch direction
            viewbox.StretchDirection = StretchDirection.Both;

            // Initialize a new Button
            Button button = new Button();
            button.Content = "Stretch In Code";

            // Put the Button inside Viewbox
            viewbox.Child = button;

            // Finally, put the Viewbox on stack panel
            StackPanel1.Children.Add(viewbox);
        }
    }
}