act1.cs

using System;

using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using System.Threading;

namespace HelloAndroid
{
  [Activity (Label = "HelloAndroid", MainLauncher = true)]
	public class Activity1 : Activity
	{
		int count;

		protected override void OnCreate (Bundle bundle)
		{

			base.OnCreate (bundle);
			
			SwitchLayoutA();

			//base.OnCreate (bundle);
		}

		protected void SwitchLayoutA ()
		{
			//Create the user interface in code
			var layout = new LinearLayout (this);
			layout.Orientation = Orientation.Vertical;
			
			var aLabel = new TextView (this);
			aLabel.SetText(Resource.String.helloLabelText);
			
			var aButton = new Button (this);      
			aButton.SetText(Resource.String.helloButtonText);
			aButton.Click += (sender, e) => {
				aLabel.Text = "Hello from the button";
				SwitchLayoutB ();
			};
			
			layout.AddView (aLabel);
			layout.AddView (aButton);
			SetContentView (layout);
		}

		protected void SwitchLayoutB ()
		{
			// Set our view from the "main" layout resource
			SetContentView (Resource.Layout.Main);

			count = 1;
			
			Button button = FindViewById<Button> (Resource.Id.myButton);
			
			button.Click += delegate {
				if( count > 3 ){
					System.Threading.Tasks.Task.Factory.StartNew (() => {
						Thread.Sleep(3000);
           // !! APLICATION STOP RESPONDING. No error log shows in console.
						SwitchLayoutA();
					});
					return;
				}
				button.Text = string.Format ("{0} clicks!", count++);
			};
		}
	}
}