Navigation.Navigate - wpf

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C#

WPF

hi every body
i am new in wpf
i try to make an application with NavigationWindows

1.in my project i make a directory with name 'dir1' and add a page that named 'Page1.xaml' in it.

2.i add another page named 'MainPage.xaml' in the root and put a button in it to click on it and navigate to page1.xaml in directory 'dir1'....

3.i changed my MainWindow.xaml file to :

<navigationwindow x:class="ShahrdariKashan.MainWindow" xmlns:x="#unknown">
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
Source="MainPage.xaml"
                  FlowDirection="RightToLeft"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525" WindowState="Maximized">
    
</navigationwindow>

4.i change my app.xaml file like bellow:

<application x:class="ShahrdariKashan.App" xmlns:x="#unknown">
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="MainWindow.xaml">
    <application.resources>
         
    </application.resources>
</application>

in the button's click event i write ;

NavigationService.Navigate("/dir1/Page1.xaml");

but no work ,
please help me;
thanks alot