Generic pager adapter for use with Android PagerTabStrip. This one used the v13 version with "native" Fragments

GennericPagerAdapter.cs

public class GenericPagerAdpapter<T> : Android.Support.V13.App.FragmentPagerAdapter where T : Fragment
	{
		public GenericPagerAdpapter (FragmentManager fm) : base(fm)
		{
		}

		public Func<int, T> ItemAtPosition;
		public Func<int> ItemCount;
		public Func<int, string> TitleAtPosition;

		public override int Count
		{
			get {
				return this.ItemCount();
			}
		}

		public override Fragment GetItem (int position)
		{
			return this.ItemAtPosition(position);
		}

		public override ICharSequence GetPageTitleFormatted(int position)
		{
			var stringTitle = this.TitleAtPosition(position);
			var titles = CharSequence.ArrayFromStringArray(new [] { stringTitle });
			return titles[0];
		}
	}

usage.cs

var fragments = new Fragment[] {
				new TimeFragment (),
				new StopwatchFragment (),
				new AboutFragment ()
			};

			var titles = new [] { 
				"Time", 
				"Stopwatch", 
				"About"
			};
			
var viewPager = FindViewById<Android.Support.V4.View.ViewPager> (Resource.Id.viewPager);

viewPager.Adapter = new GenericPagerAdpapter<Fragment> (this.FragmentManager) {
				ItemCount = () => titles.Length,
				ItemAtPosition = pos => fragments [pos],
				TitleAtPosition = pos => titles [pos]
			};