How do you navigate between multiple pages in silverlight 4

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Silverlight

I've made a multi-page website in Silverlight for an art gallery.

I made it in a Silverlight application, not a navigation application, I have been trying to add navigation, by following tutorials online, but none of them work.

I've noticed that all these tutorials are for SL 2 not 4.

They've said this shouldn't make a difference but it still doesn't work, no matter what I do.

Here is the code for the mainpage:

<usercontrol x:class="LondonArtGallery.MainPage" xmlns:x="#unknown">
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation" 
    xmlns:uriMapper="clr-namespace:System.Windows.Navigation;assembly=System.Windows.Controls.Navigation"
    mc:Ignorable="d"
    d:DesignHeight="589" d:DesignWidth="1037" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk">

    <grid x:name="LayoutRoot" removed="#FF5A479A" height="588" width="1037" showgridlines="True">
        <grid.rowdefinitions>
            <rowdefinition height="86*" />
            <rowdefinition height="35*" />
            <rowdefinition height="467*" />
        </grid.rowdefinitions>
        
            <hyperlinkbutton content="Gallery" height="35" horizontalalignment="Left" margin="173,0,0,0" name="btnGallery" navigateuri="/GalleryPage" verticalalignment="Top" width="80" fontsize="16" removed="#FF0D91F8" foreground="#FFE9EFF5" verticalcontentalignment="Center" horizontalcontentalignment="Center" targetname="_parent" click="btnGallery_Click_1" grid.row="1" />

    </grid>

</usercontrol>

I haven't added anything else to the other pages or the cs files.

So can someone guide me through on how to do this?