ContentPage с несколькими элементами UI

App.cs

public App ()
		{
		    // The root page of your application
		    var layout = new StackLayout
		    {
		        VerticalOptions = LayoutOptions.Center,
		        Children = {
		            new Label {
		                HorizontalTextAlignment = TextAlignment.Center,
		                Text = "Welcome to Xamarin Forms!"
		            }
		        }
		    };

		    MainPage = new ContentPage
		    {
		        Content = layout
		    };

		    Button button = new Button
		    {
		        Text = "Click Me"
		    };

		    button.Clicked += async (s, e) => {
		        await MainPage.DisplayAlert("Alert", "You clicked me", "OK");
		    };

		    layout.Children.Add(button);
        }