How to create SfNavigationDrawer sample in code behind

namespace NavigationDrawerSample
{
public partial class NavigationDrawerSamplePage : ContentPage
{
SfNavigationDrawer navigationDrawer = new SfNavigationDrawer();
    void ListView_ItemSelected(object sender, SelectedItemChangedEventArgs e)
    {
        if (e.SelectedItem.ToString() == "Profile")
        {
            navigationDrawer.ContentView = new Profile().Content;
        }
        else if (e.SelectedItem.ToString() == "Sent")
        {
            navigationDrawer.ContentView = new Sent().Content;
        }
        else if (e.SelectedItem.ToString() == "Draft")
        {
            navigationDrawer.ContentView = new Draft().Content;
        }
        else if (e.SelectedItem.ToString() == "Inbox")
        {
            navigationDrawer.ContentView = new Inbox().Content;
        }
        else if (e.SelectedItem.ToString() == "Out box")
        {
            navigationDrawer.ContentView = new OutBox().Content;
        }
        else if (e.SelectedItem.ToString() == "Home")
        {
            navigationDrawer.ContentView = new Home().Content;
        }
        navigationDrawer.ToggleDrawer();
    }
 
 
public NavigationDrawerSamplePage()
{
    InitializeComponent();
 
    Grid myGrid = new Grid();
 
    RowDefinition rowDef1 = new RowDefinition();
    RowDefinition rowDef2 = new RowDefinition();
    rowDef1.Height = 40;
 
    myGrid.RowDefinitions.Add(rowDef1);
    myGrid.RowDefinitions.Add(rowDef2);
 
    StackLayout stack = new StackLayout();
    stack.Orientation = StackOrientation.Horizontal;
    stack.HorizontalOptions = LayoutOptions.FillAndExpand;
    stack.BackgroundColor = Color.FromHex("1aa1d6");
    Label title = new Label();
    title.Text = "Home";
    title.VerticalTextAlignment = TextAlignment.Center;
    title.HorizontalTextAlignment = TextAlignment.Center;
    title.HeightRequest = 50;
    title.FontSize = 16;
    title.TextColor = Color.Black;
    title.BackgroundColor = Color.FromHex("1aa1d6");
 
    Button button = new Button();
    button.Image = (FileImageSource)ImageSource.FromFile("hamburgericon.png");
    button.HeightRequest = 50;
    button.WidthRequest = 50;
    button.BackgroundColor = Color.FromHex("#1aa1d6");
 
    ListView listView = new ListView();
    List<string> list = new List<string>();
 
    list.Add("Home");
    list.Add("Profile");
    list.Add("Inbox");
    list.Add("Out box");
    list.Add("Sent");
    list.Add("Draft");
    listView.ItemsSource = list;
    //Initializing navigationDrawer control
    //Label which has to be at the top of MainContent View.
 
    button.Clicked += (sender, e) =>
    {
        navigationDrawer.ToggleDrawer();
    };
 
    stack.Children.Add(button);
    stack.Children.Add(title);
 
    //Label which denotes the Content View 
    Label contentLabel = new Label();
    contentLabel.HorizontalTextAlignment = TextAlignment.Center;
 
    contentLabel.FontSize = 14;
    contentLabel.Text = "Content View";
    contentLabel.TextColor = Color.Black;
 
    //Grid which we have used to set the Drawer Header View
    Grid headerLayout = new Grid();
    headerLayout.BackgroundColor = Color.FromHex("#1aa1d6");
 
    // Codes to set Drawer Header.
    Label header = new Label();
    header.Text = "Header View";
    header.FontSize = 14;
    header.TextColor = Color.White;
    header.HorizontalTextAlignment = TextAlignment.Center;
    header.VerticalTextAlignment = TextAlignment.Center;
    header.BackgroundColor = Color.FromHex("#1aa1d6");
 
    headerLayout.Children.Add(header);
    navigationDrawer.DrawerHeaderView = headerLayout;
 
    //Grid to set the Drawer Footer View.
    Grid footerLayout = new Grid();
    footerLayout.BackgroundColor = Color.FromHex("#1aa1d6");
 
    //Codes to set Drawer Footer.
    Label footer = new Label();
    footer.Text = "Footer View";
    footer.FontSize = 14;
    footer.TextColor = Color.White;
    footer.HorizontalTextAlignment = TextAlignment.Center;
    footer.VerticalTextAlignment = TextAlignment.Center;
    footer.BackgroundColor = Color.FromHex("#1aa1d6");
    footerLayout.Children.Add(footer);
    navigationDrawer.DrawerFooterView = footerLayout;
    //SfNavigationDrawer Properties
    navigationDrawer.Position = Position.Left;
    navigationDrawer.Transition = Transition.SlideOnTop;
    navigationDrawer.DrawerWidth = 200;
    navigationDrawer.DrawerHeaderHeight = 50;
    navigationDrawer.DrawerFooterHeight = 50;
    navigationDrawer.DrawerContentView = listView;
    //StackLayout to set the SfNavigationDrawer MainContentView.
    StackLayout maincontent = new StackLayout();
    Grid.SetRow(stack, 0);
    Grid.SetRow(navigationDrawer, 1);
    myGrid.Children.Add(stack);
    myGrid.Children.Add(navigationDrawer);
    //maincontent.Children.Add(myGrid);
    navigationDrawer.ContentView = maincontent;
    listView.ItemSelected += ListView_ItemSelected;
    this.Content = myGrid;
}
}
}