App.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Xamarin.Forms;

namespace SG {
  public class App {
    public static Page GetMainPage() {
      return new ContentPage {   
        Content = new Label {
          Text = "Hello, Forms !",
          VerticalOptions = LayoutOptions.CenterAndExpand,
          HorizontalOptions = LayoutOptions.CenterAndExpand,
        },
      };
    }
  }
}