UI Controls Silverlight

    xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' 
    xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'
    xmlns:d='http://schemas.microsoft.com/expression/blend/2008' 
    xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006' 
    mc:Ignorable='d' 
    d:DesignWidth='640' 
    d:DesignHeight='480'>
                Background="White">
                           Text="Some Plain Text"
                   HorizontalAlignment="Center"
                   VerticalAlignment="Top" />
                        Content="Change Text"
                Height="30"
                Width="80"/>
    

//File: Page.xaml.cs
 using System;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Media.Animation;
 namespace SilverlightApplication3
 {
      public partial class MainPage : UserControl
      {
         public MainPage()
          {
             InitializeComponent();
             myButton.Click += new RoutedEventHandler(myButton_Click);
          }
         void myButton_Click(object sender, RoutedEventArgs e)
          {
             myText.FontFamily = new FontFamily("Comic Sans MS");
             myText.FontSize = 30;
             myText.Text = "Some Cool Text";
             myButton.Content = "Clicked";
          }
      }
 }