How to Preview XAML in Xamarin.Forms in Xamarin Sketches

using Xamarin.Forms;
using System.Reflection;
using System.Runtime.CompilerServices;
using Xamarin.Forms.Xaml;

var xaml=@"<?xml version="1.0""encoding="utf-8""?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms""xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml""x:Class="XamlSamples.HelloXamlPage""
             Title= "Hello XAML Page"
             Padding="10, 40, 10, 10" >

  <Label Text="Hello, XAML Sketch!"
         VerticalOptions= "Start"
         XAlign="Center"
         Rotation="15"
         IsVisible="true"
         Font="Bold, 80"
         TextColor="Red" / >

</ContentPage>";

varpage = new ContentPage {Padding = new Thickness(0,20,0,0)};
vars=((((MethodInfo)((TypeInfo)(((TypeInfo)((new AssemblyName("Xamarin.Forms.Xaml, Version=1.2.3.0, Culture=neutral, PublicKeyToken=null"))
    .GetTypes().Where(t=>t.FullName=="Xamarin.Forms.Xaml.Extensions").First())).DeclaredMembers
    .Where(t=>!((MethodInfo)t).Attributes.HasFlag(System.Reflection.MethodAttributes.Family))).First())).MakeGenericMethod(typeof(ContentPage))).Invoke(null,newobject[]{page,xaml})!=null
RootPage.Children.Add(page);