Page1View.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="Core.Views.Page1View"
	Title="Page 1"
>
	<ContentPage.Content>
		<StackLayout>
			<Button
				Text="Goto page 2"
				Command="{Binding GotoPage2Command}"
			></Button>
		</StackLayout>
	</ContentPage.Content>
</ContentPage>

Page1View.xaml.cs

using Core.ViewModels;
using Xamarin.Forms;

namespace Core.Views
{
	public partial class Page1View : ContentPage
	{
		public Page1View()
		{
			InitializeComponent();
			BindingContext = new Page1ViewModel();
		}
	}
}