HelloAndroid

using Android.App;
using Android.Widget;
using Android.OS;

var rootActivity= StartedActivities.FirstOrDefault();
var layout = new LinearLayout(rootActivity);
			layout.Orientation = Orientation.Vertical;

			var aLabel = new TextView(rootActivity);
			aLabel.Text = "Hello, World!!!";

			var aButton = new Button(rootActivity);
			aButton.Text = "Say Hello!";

			aButton.Click += (sender, e) =>
			 { aLabel.Text = "Hello Android!"; };

			layout.AddView(aLabel);
			layout.AddView(aButton);
rootActivity.SetContentView(layout);