using System;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
namespace WpfDatabind1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
       
        public MainWindow()
        {
            InitializeComponent();
            Binding bind1 = new Binding();
            bind1.Source =textBox1;// ? Set the Source
            bind1.Path = new PropertyPath( "Text" );// ? Set the Path
            // Connect the Source and the Target.
            label1.SetBinding( Label.ContentProperty, bind1 );
            label2.SetBinding(Label.ContentProperty, bind1);   
        }

        private void textBox1_TextChanged(object sender, TextChangedEventArgs e)
        {
           // textBox1 is engaged as a source and will throw error 
            //label2.Content = textBox1.Text;  
        }

        private void textBox2_TextChanged(object sender, TextChangedEventArgs e)
        {
        label2.Content = textBox2.Text;
        }  
    }
}