How to add Syncfusion controls inside NavigationDrawer

<ContentPage.Content>

<busy:SfBusyIndicator x:Name="busyindicator" Title="Application Loading..." AnimationType="Rectangle" ViewBoxWidth = "200" ViewBoxHeight="250" TextColor="Maroon" BackgroundColor="White" />

</ContentPage.Content>

<ContentPage.Content>

  <numeric:SfNumericUpDown FormatString="c" SpinButtonAlignment="Left" BackgroundColor="White" />

</ContentPage.Content>

<ContentPage.Content>

    <range:SfRangeSlider x:Name="rangeslider" Orientation="Horizontal" SnapsTo="Ticks" ShowValueLabel="true" ValuePlacement="TopLeft" HeightRequest="50" Minimum="0" Maximum="100" StepFrequency="6"/>

</ContentPage.Content>

namespace DrawerExample

{

public partial class MainPage : ContentPage

{

    public MainPage()

    {

        InitializeComponent();

        SfNavigationDrawer navigationDrawer = new SfNavigationDrawer();

        navigationDrawer.Position = Position.Left;

        navigationDrawer.Transition = Transition.Push;

        navigationDrawer.TouchThreshold = 50;

        navigationDrawer.Duration = 1000;

        navigationDrawer.DrawerWidth = 150;

        navigationDrawer.DrawerHeight = 100;

        navigationDrawer.DrawerHeaderHeight = 100;

        navigationDrawer.DrawerFooterHeight = 100;

        Grid headerLayout = new Grid();

        headerLayout.BackgroundColor = Color.FromHex("#1aa1d6");

        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;

        ObservableCollection<String> list = new ObservableCollection<string>();

        list.Add("RangeSlider");

        list.Add("BusyIndicator");

        list.Add("NumericUpDown");

        StackLayout mainStack = new StackLayout();

        mainStack.Orientation = StackOrientation.Vertical;

        mainStack.HeightRequest = 500;

        ListView listView = new ListView();

        listView.WidthRequest = 200;

        listView.VerticalOptions = LayoutOptions.FillAndExpand;

        listView.ItemsSource = list;

        mainStack.Children.Add(listView);

        navigationDrawer.DrawerContentView = mainStack;

        Button Btnmenu = new Button();

        Btnmenu.Text = "Show Menu";

        Btnmenu.HorizontalOptions = LayoutOptions.CenterAndExpand;

        Btnmenu.VerticalOptions = LayoutOptions.CenterAndExpand;

        Btnmenu.BackgroundColor = Color.FromHex("#1aa1d6");

        StackLayout Stack = new StackLayout();

        Stack.BackgroundColor = Color.White;

        Stack.HeightRequest = 100;

        Stack.HorizontalOptions = LayoutOptions.Center;

        Stack.VerticalOptions = LayoutOptions.Center;

        listView.ItemSelected += (object sender, SelectedItemChangedEventArgs e) =>

        {

            if (e.SelectedItem.ToString().Equals("RangeSlider"))

            {

                navigationDrawer.EnableSwipeGesture = true;

                navigationDrawer.ContentView = new RangeSlider().Content;

            }

            if (e.SelectedItem.ToString().Equals("BusyIndicator"))

            {

                navigationDrawer.EnableSwipeGesture = true;

                navigationDrawer.ContentView = new BusyIndicator().Content;

            }

            if (e.SelectedItem.ToString().Equals("NumericUpDown"))

            {

                navigationDrawer.EnableSwipeGesture = true;

                navigationDrawer.ContentView = new NumericUpDown().Content;

            }

        };

        Stack.Children.Add(Btnmenu);

        navigationDrawer.ContentView = Stack;

        StackLayout footerLayout = new StackLayout();

        footerLayout.BackgroundColor = Color.FromHex("#1aa1d6");

        Label footer = new Label();

        footer.Text = "Footer View";

        footer.FontSize = 14;

        footer.TextColor = Color.White;

        footer.HorizontalOptions = LayoutOptions.CenterAndExpand;

        footer.VerticalOptions = LayoutOptions.CenterAndExpand;

        footer.BackgroundColor = Color.FromHex("#1aa1d6");

        footerLayout.Children.Add(footer);

        navigationDrawer.DrawerFooterView = footerLayout;

        this.Content = navigationDrawer;

        Btnmenu.Clicked += (sender_, e3) =>

        {

            DependencyService.Get<IToggleDrawer>().ToggleDrawer();

        };

    }

}

}

Image for content page of NavigationDrawer:

Image for busy indicator:

Image for range slider:

Image for NumericalUpDown: