Navigating to pages within the app

Hi,

I want to navigate between pages within my WPF application in C#, but I am not sure if I am using the correct way.

Currently I am using this:

private void Register_Click(object sender, RoutedEventArgs e)
        {
            Register Register = new Register();
            Register.WindowStartupLocation = WindowStartupLocation.CenterScreen;
            Register.Show();
            this.Close();
        }

I seen a example of using Method NavigationService.Navigate from this link.

private void TestPage_Click(object sender, RoutedEventArgs e)
        {
            this.NavigationService.Navigate(new Uri("TestPage.xaml", UriKind.Relative));
        }

But I am getting this error:

Error 1 'WPF_Test.MainWindow' does not contain a definition for 'NavigationService' and no extension method 'NavigationService' accepting a first argument of type 'WPF_Test.MainWindow' could be found (are you missing a using directive or an assembly reference?) C:\Users\John\Dropbox\VS Projects\WPF Test\WPF Test\MainWindow.xaml.cs 29 18 WPF Test

I not sure where to add the definition for navigationservice. Everything I tried did not work. Please keep in mind I am a noob at programing, so I welcome any help.

Thanks,

John

John Lisenby developer of My PC Playbook