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***
In Shared code:

	public class WebViewPage : ContentPage
	{
	}

...

await Navigation.PushAsync (new WebViewPage());

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<StackLayout VerticalOptions="Center">
            <Label x:Name="lblText" Text="0" HorizontalOptions="Start" FontSize="Micro" HorizontalTextAlignment="Center" VerticalOptions="EndAndExpand" >
            <Label.Margin>
                <OnPlatform x:TypeArguments="Thickness">
                    <On Platform="iOS" Value="15,0" />
                    <On Platform="Android" Value="10,0" />
                </OnPlatform>
                </Label.Margin>
            </Label>
            <Slider x:Name="mySlider" Maximum="10000" Minimum="100" HorizontalOptions="FillAndExpand" ValueChanged="Handle_ValueChanged" >

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class EmptyCollectionContractResolver : DefaultContractResolver {
    protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization) {
        JsonProperty property = base.CreateProperty(member, memberSerialization);

        Predicate<object> shouldSerialize = property.ShouldSerialize;
        property.ShouldSerialize = obj => (shouldSerialize == null || shouldSerialize(obj)) && !IsEmptyCollection(property, obj);
        return property;
    }

    private bool IsEmptyCollection(JsonProperty property, object target) {

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<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
			 xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
			 x:Class="MyApp.LayoutPage">
	<ContentPage.Content>
		<StackLayout>
			<Image Source="icon.png" />
		</StackLayout>
	</ContentPage.Content>
</ContentPage>

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void Slider_ValueChanged(object sender, Xamarin.Forms.ValueChangedEventArgs e)
{
 var newStep = Math.Round(e.NewValue / 100);
 mySlider.Value = newStep * 100;
 lblText.Text = mySlider.Value.ToString();
 lblText.TranslateTo(mySlider.Value * ((mySlider.Width - 40) / mySlider.Maximum) , 0, 100);
}

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public class ListViewPageViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        protected void OnPropertyChanged([CallerMemberName]string propertyName = "") => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

        private IList<Birds> birdsList;
        bool isRefreshing;
        private bool isEmpty;

        public bool IsEmpty

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public class Birds
{
        public string Title { get; set; }
        public string Description { get; set; }
}

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 public class Converter : IValueConverter
{
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return !(bool)value;
        }
        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return !(bool)value;
        }

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 <ContentView.Content>
   <StackLayout VerticalOptions="Center" HorizontalOptions="Center">
       <Image Source="empty.png"/>
       <Label Text="There is nothing in here." FontSize="Medium" TextColor="{DynamicResource TextColorLight}"/>
   </StackLayout>
</ContentView.Content>

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<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
              xmlns:control="clr-namespace:XFEmptyViewSample.Controls"
               xmlns:helper="clr-namespace:XFEmptyViewSample.Helpers"
               xmlns:viewmodel="clr-namespace:XFEmptyViewSample.ViewModels"
             x:Class="XFEmptyViewSample.Views.ListViewPage" Title="Birds">
    <ContentPage.BindingContext>
        <viewmodel:ListViewPageViewModel/>
    </ContentPage.BindingContext>