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<ImageButton Aspect="AspectFill" BorderColor="Purple"  BorderWidth="3" 
             Source="xamarin_logo.png" AutomationProperties.HelpText="Xamarin Logo" />

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WebView myWebView = new WebView();
myWebView.Reload();

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<Shell xmlns="http://xamarin.com/schemas/2014/forms"
       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
       xmlns:local="clr-namespace:TailwindTraders"
       x:Class=" TailwindTraders.Shell"
       Title="TailwindTraders">
    <ShellItem Title="Home">
        <ShellSection>
            <ShellContent>
                <local:HomePage />
            </ShellContent>

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<CollectionView ItemsSource="{Binding Blogs}">
    <CollectionView.ItemTemplate>
        <DataTemplate>
            <Grid Padding="10">
              
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                </Grid.RowDefinitions>
              

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public class RestService : IRestService
{
  HttpClient client;
  ...

  public RestService ()
  {
    client = new HttpClient (); // Creating the HTTPClient Object
  }
  

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/// XF Project
namespace UsingDependencyService
{
    public interface IToDo {
        void ToDo (); //note that interface members are public by default
    }
}

namespace UsingDependencyService.Service
{

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...
Forms.SetFlags("Visual_Experimental");
...

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<ContentPage ...
             Visual="Material">
    ...
</ContentPage>  

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...
new Entry { Placeholder = "Sigueme en las redes @luismatosluna", Keyboard = Keyboard.Numeric }            
            .Grid.Row(2) .Grid.ColumnSpan(2) .Margin(myMargin) .Height(20) 
            .Bind(nameof(vm.RegistrationCode), BindingMode.TwoWay),
...

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...
<Entry Placeholder="Sigueme en las redes @luismatosluna" Keyboard="Numeric"
       Margin="{StaticResource myMargin}" HeightRequest="20"
       Grid.Row="2" Grid.ColumnSpan="2"
       Text="{Binding RegistrationCode, Mode=TwoWay}" />
...