Without Binding

   
  
<Window
  x:Class="WpfApplication1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="WithoutBinding" Height="135" Width="200">
  <StackPanel>
    <TextBlock>Name:</TextBlock>
    <TextBox Name="nameTextBox"/>
    <TextBlock>Age:</TextBlock>
    <TextBox Name="ageTextBox"/>
    <Button Name="birthdayButton">Birthday</Button>
  </StackPanel>
</Window>
//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.ComponentModel;

namespace WpfApplication1{
  public class Employee : INotifyPropertyChanged {
    public event PropertyChangedEventHandler PropertyChanged;
    protected void Notify(string propName) {
      if( this.PropertyChanged != null ) {
        PropertyChanged(this, new PropertyChangedEventArgs(propName));
      }
    }

    string name;
    public string Name {
      get { return this.name; }
      set {
        this.name = value;
        Notify("Name");
      }
    }

    int age;
    public int Age {
      get { return this.age; }
      set {
        this.age = value;
        Notify("Age");
      }
    }

    public Employee() { }
    public Employee(string name, int age) {
      this.name = name;
      this.age = age;
    }
  }

  public partial class Window1 : Window {
    Employee emp = new Employee("Tom", 11);
    public Window1() {
      InitializeComponent();
      this.nameTextBox.Text = emp.Name;
      this.ageTextBox.Text = emp.Age.ToString();
      emp.PropertyChanged += emp_PropertyChanged;
      this.nameTextBox.TextChanged += nameTextBox_TextChanged;
      this.ageTextBox.TextChanged += ageTextBox_TextChanged;
      this.birthdayButton.Click += birthdayButton_Click;
    }

    void emp_PropertyChanged(object sender, PropertyChangedEventArgs e) {
      switch( e.PropertyName ) {
        case "Name":
        this.nameTextBox.Text = emp.Name;
        break;

        case "Age":
        this.ageTextBox.Text = emp.Age.ToString();
        break;
      }
    }

    void nameTextBox_TextChanged(object sender, TextChangedEventArgs e) {
      emp.Name = nameTextBox.Text;
    }

    void ageTextBox_TextChanged(object sender, TextChangedEventArgs e) {
      int age = 0;
      if( int.TryParse(ageTextBox.Text, out age) ) {
        emp.Age = age;
      }
    }

    void birthdayButton_Click(object sender, RoutedEventArgs e) {
      ++emp.Age;
      Console.WriteLine(emp.Name);
      Console.WriteLine(emp.Age);
    }
  }
}