maui-linux/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue1567.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;

namespace Xamarin.Forms.Controls
{
	[Preserve (AllMembers=true)]
	[Issue (IssueTracker.Github, 1567, "NRE in NavigationProxy.set_Inner", PlatformAffected.iOS)]
	public class Issue1567
		: ContentPage
	{
		public Issue1567()
		{
			Title = "Test";
			var label = new Label { Text = "Whatever" };

			ToolbarItems.Add (new ToolbarItem ("Modal", null, async () => {
				var cp2 = new ContentPage () {
						Title = "Modal",
						Content = new Label (){ Text = "Second screen" },
				};
				//var np2 = new NavigationPage(cp2) { Title = "Modal" };
				try {
					await Navigation.PushModalAsync (cp2);
				} catch (InvalidOperationException ex) {
					label.Text = "Exception properly thrown: " + ex.Message;
				}
			}));

			Content = label;
		}
	}
}