Silverlight Tutorial: Creating an Animated Navigation Bar using Storyboards

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace TutorialNavbarXap
{
    public partial class Page : UserControl
    {
        Nav1Page m_nav1Page = new Nav1Page();
        Nav2Page m_nav2Page = new Nav2Page();
        Nav3Page m_nav3Page = new Nav3Page();

        public Page()
        {
            InitializeComponent();
            Loaded += new RoutedEventHandler(PageLoaded);

        }

        void PageLoaded(object sender, RoutedEventArgs e)
        {
            // Remove all content add then add the Nav1Page
            RemoveAll();
            ContentCanvas.Children.Add(m_nav1Page);

            // Highlight Nav1
            HighlightNone();
            Nav1Highlight.Opacity = 100.0;

        }

        void RemoveAll()
        {
            ContentCanvas.Children.Remove(m_nav1Page);
            ContentCanvas.Children.Remove(m_nav2Page);
            ContentCanvas.Children.Remove(m_nav3Page);
        }

        private void OnNav1Click(object sender, MouseButtonEventArgs e)
        {
            RemoveAll();
            ContentCanvas.Children.Add(m_nav1Page);
        }

        private void OnNav2Click(object sender, MouseButtonEventArgs e)
        {
            RemoveAll();
            ContentCanvas.Children.Add(m_nav2Page);
        }

        private void OnNav3Click(object sender, MouseButtonEventArgs e)
        {
            RemoveAll();
            ContentCanvas.Children.Add(m_nav3Page);
        }

        private void HighlightNone()
        {
            Nav1Highlight.Opacity = 0.0;
            Nav2Highlight.Opacity = 0.0;
            Nav3Highlight.Opacity = 0.0;

        }

        private void OnNav1Enter(object sender, MouseEventArgs e)
        {
            HighlightNone();
            Nav1Highlight.Opacity = 100.0;
            MoveToNav1.Begin();
        }

        private void OnNav2Enter(object sender, MouseEventArgs e)
        {
            HighlightNone();
            Nav2Highlight.Opacity = 100.0;
            MoveToNav2.Begin();
        }

        private void OnNav3Enter(object sender, MouseEventArgs e)
        {
            HighlightNone();
            Nav3Highlight.Opacity = 100.0;
            MoveToNav3.Begin();
        }

    }
}