WPF C# Tutorial

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="300" Width="300">
    
                         Name="textBox1" TextAlignment="Left" TextWrapping="Wrap" 
                 VerticalScrollBarVisibility="Auto">
            Default starting text.
        
        
            
                
            

                                     HorizontalAlignment="Center" IsChecked="True"
                         Margin="5" Name="editableRadioButton" >
                Editable
                                     HorizontalAlignment="Center" Margin="5"
                         Name="readonlyRadioButton">
                Read Only
        

    


//File:Window.xaml.cs
using System.Windows;
using System.Windows.Controls;
namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }
        private void EditableChecked(object sender, RoutedEventArgs e)
        {
            RadioButton button = e.OriginalSource as RadioButton;
            if (e.OriginalSource == editableRadioButton)
            {
                textBox1.IsReadOnly = false;
            }
            else if (e.OriginalSource == readonlyRadioButton)
            {
                textBox1.IsReadOnly = true;
            }
            textBox1.Focus();
        }
    }
}