Windows Presentation Foundation (WPF). ���� 1. ��� ��� ����� � � ��� ��� "����"

<Window x:Class="WpfApplication2.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        Title="������� ����" Height="350" Width="525">

    <Grid>

    </Grid>

</Window>

<NavigationWindow x:Class="WpfApplication2.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        Title="������� ����" Height="350" Width="525">

</NavigationWindow>

using System;

using System.Collections.Generic;

using System.Linq;

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.Navigation;

using System.Windows.Shapes;

namespace WpfApplication2

{

    /// <summary>

    /// ������ �������������� ��� MainWindow.xaml

    /// </summary>

    public partial class MainWindow : Window

    {

        public MainWindow()

        {

            InitializeComponent();

        }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

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.Navigation;

using System.Windows.Shapes;

namespace WpfApplication2

{

    /// <summary>

    /// ������ �������������� ��� MainWindow.xaml

    /// </summary>

    public partial class MainWindow : NavigationWindow

    {

        public MainWindow()

        {

            InitializeComponent();

        }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

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.Navigation;

using System.Windows.Shapes;

namespace WpfApplication2

{

    /// <summary>

    /// ������ �������������� ��� Page2.xaml

    /// </summary>

    public partial class Page2 : Page

    {

        public Page2()

        {

            InitializeComponent();

        }

    }

}

    public partial class Page2 : Page

    {

        public Page2(string str)

        {

            InitializeComponent();

            label1.Content = str;

        }

    }

        private void button1_Click(object sender, RoutedEventArgs e)

        {

            Page2 page = new Page2("������ ������ ������");

            this.NavigationService.Navigate(page);

        }

        private void button2_Click(object sender, RoutedEventArgs e)

        {

            Page2 page = new Page2("������ ������ ������");

            this.NavigationService.Navigate(page);

        }