UWP - Create Button programmatically

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="stack_panel1" 
        Margin="100" 
        Orientation="Vertical"
        >
    </StackPanel>
</Page>
MainPage.xaml.cs

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


namespace UniversalAppTutorials
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();

            // Create the controls
            CreateControls();
        }

        private void CreateControls() {
            // Initialize a new Button control
            Button button1 = new Button();

            // Set button content
            button1.Content = "Click Me";

            // Set button height and width
            button1.Width = 200;
            button1.Height = 75;

            // Add a click event
            button1.Click += Button1_Click;

            // Add the newly created button control to the stack panel
            stack_panel1.Children.Add(button1);
        }

        // Handle the button click event
        private void Button1_Click(object sender, RoutedEventArgs e) {
            Button b = (Button) sender;
            b.Content = "Clicked";
        }
    }
}