TableSource.cs

using System;
using MonoTouch.Foundation;
using MonoTouch.UIKit;
using System.Threading.Tasks;

namespace BasicTable {
  public class TableSource : UITableViewSource {
		protected string[] tableItems;
		protected string cellIdentifier = "TableCell";
	
		public TableSource (string[] items)
		{
			tableItems = items;
		}
	
		/// <summary>
		/// Called by the TableView to determine how many cells to create for that particular section.
		/// </summary>
		public override int RowsInSection (UITableView tableview, int section)
		{
			return tableItems.Length;
		}
		
		/// <summary>
		/// Called when a row is touched
		/// </summary>
		public override async void RowSelected (UITableView tableView, NSIndexPath indexPath)
		{
			string sResponse = "";

			var result = await ShowMessageAsync ("Continue?", "Row Selected", new string[] {"Yes", "No"});
			if (result == "Yes") {
				sResponse = "Did Continue";
			} else {
				sResponse = "Did NOT Continue";
			}

			new UIAlertView(sResponse, tableItems[indexPath.Row], null, "OK", null).Show();

			tableView.DeselectRow (indexPath, true);
		}
		
		/// <summary>
		/// Called by the TableView to get the actual UITableViewCell to render for the particular row
		/// </summary>
		public override UITableViewCell GetCell (UITableView tableView, MonoTouch.Foundation.NSIndexPath indexPath)
		{
			// request a recycled cell to save memory
			UITableViewCell cell = tableView.DequeueReusableCell (cellIdentifier);
			// if there are no cells to reuse, create a new one
			if (cell == null)
				cell = new UITableViewCell (UITableViewCellStyle.Default, cellIdentifier);

			cell.TextLabel.Text = tableItems[indexPath.Row];
			return cell;
		}

		public Task<string> ShowMessageAsync (string sMessage, string sTitle, params string[] asButtons)
		{
			var view = new UIAlertView (sTitle, sMessage, null, null, asButtons);
			var tsc = new TaskCompletionSource<string> ();
			view.Show ();

			view.Clicked += (sender, e) =>  {
				tsc.SetResult (view.ButtonTitle (e.ButtonIndex)); //Set result end the await
			};
			return tsc.Task;
		}
	}
}