AppDelegate.cs

//
//  Author:
//       Nicolas VERINAUD <nicolas@chloro.eu>
//
//  Copyright (c) 2014 Chlorophyll Vision. All Rights Reserved.
//
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reactive.Linq;
using MonoTouch.Foundation;
using MonoTouch.UIKit;

namespace ObservableCombineLatestBug
{
	[Register("AppDelegate")]
	public partial class AppDelegate : UIApplicationDelegate
	{
		UIWindow window;

		public override bool FinishedLaunching(UIApplication app, NSDictionary options)
		{
			var ret1 = Observable.Return ("1"); // Changing to 1 as opposed to "1" works.
			Observable.CombineLatest(ret1, ret1, ret1, (a, b, c) => {
				Console.WriteLine("First CombineLatest");
				return true;
			}).Subscribe(_ => {});

			var interval1 = Observable.Interval(TimeSpan.FromSeconds(1));
			Observable.CombineLatest(interval1, interval1, interval1, (a, b, c) => {
				Console.WriteLine("Subsequent CombineLatest");
				return true;
			}).Subscribe(_ => {});

			window = new UIWindow(UIScreen.MainScreen.Bounds);
			window.MakeKeyAndVisible();

			return true;
		}
	}
}