UWP - TextBox TextChanged event 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 Padding="50" Background="AliceBlue">
        <TextBlock
            x:Name="TextBlock1"
            FontFamily="MV Boli"
            FontSize="25"
            Foreground="Crimson"
            TextWrapping="Wrap"
            Margin="5"
            />
        <TextBox
            x:Name="TextBox1"
            PlaceholderText="Input some colors here"
            Header="Colors"
            Margin="5"
            MaxHeight="125"
            Height="100"
            AcceptsReturn="True"
            TextWrapping="Wrap"
            TextChanged="TextBox1_TextChanged"
            ScrollViewer.VerticalScrollBarVisibility="Auto"
            />
    </StackPanel>
</Page>
MainPage.xaml.cs

using Windows.UI.Xaml.Controls;


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

        /*
            TextBox.TextChanged event
                Occurs when content changes in the text box.
        */

        private void TextBox1_TextChanged(object sender, TextChangedEventArgs e)
        {
            // Cast sender as a TextBox
            TextBox textBox = sender as TextBox;

            // Get the TextBox inputted text and display it on TextBlock
            TextBlock1.Text = "You inputted:\n"+textBox.Text;
        }
    }
}