public class Chore {

public Chore ()
{
}

public int Id { get; set; }
public string Name { get; set; }
public string Notes { get; set; }
public bool Done { get; set; }


}

public class RootTableSource : UITableViewSource {

// there is NO database or storage of Tasks in this example, just an in-memory List<>
Chore[] tableItems;
string cellIdentifier = "taskcell"; // set in the Storyboard

public RootTableSource (Chore[] items)
{
  tableItems = items;
}
public override nint RowsInSection (UITableView tableview, nint section)
{
  return tableItems.Length;
}
public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
{
  // in a Storyboard, Dequeue will ALWAYS return a cell,
  UITableViewCell cell = tableView.DequeueReusableCell (cellIdentifier);
  // now set the properties as normal
  cell.TextLabel.Text = tableItems[indexPath.Row].Name;
  if (tableItems[indexPath.Row].Done)
    cell.Accessory = UITableViewCellAccessory.Checkmark;
  else
    cell.Accessory = UITableViewCellAccessory.None;
  return cell;
}

public Chore GetItem(nint id) {
  return tableItems[id];
}
}

using System;
using System.Drawing;
using System.Collections.Generic;

using Foundation;
using UIKit;

namespace StoryboardTable
{
    public partial class MasterViewController : UITableViewController
    {
        List<Chore> chores;

    public MasterViewController (IntPtr handle) : base (handle)
    {
        Title = "ChoreBoard";

        // Custom initialization
        chores = new List<Chore> {
        new Chore() {Name="Groceries", Notes="Buy bread, cheese, apples", Done=false},
        new Chore() {Name="Devices", Notes="Buy Nexus, Galaxy, Droid", Done=false}
    };

    }

    public override void PrepareForSegue (UIStoryboardSegue segue, NSObject sender)
    {
        if (segue.Identifier == "TaskSegue") { // set in Storyboard
            var navctlr = segue.DestinationViewController as TaskDetailViewController;
            if (navctlr != null) {
                var source = TableView.Source as RootTableSource;
                var rowPath = TableView.IndexPathForSelectedRow;
                var item = source.GetItem(rowPath.Row);
                navctlr.SetTask (this, item); // to be defined on the TaskDetailViewController
            }
        }
    }

    public void CreateTask ()
    {
        // first, add the task to the underlying data
        var newId = chores[chores.Count - 1].Id + 1;
        var newChore = new Chore(){Id=newId};
        chores.Add (newChore);

        // then open the detail view to edit it
        var detail = Storyboard.InstantiateViewController("detail") as TaskDetailViewController;
        detail.SetTask (this, newChore);
        NavigationController.PushViewController (detail, true);
    }

    public void SaveTask (Chore chore)
    {
        var oldTask = chores.Find(t => t.Id == chore.Id);
        oldTask = chore;
        NavigationController.PopViewControllerAnimated(true);
    }

    public void DeleteTask (Chore chore)
    {
        var oldTask = chores.Find(t => t.Id == chore.Id);
        chores.Remove (oldTask);
        NavigationController.PopViewControllerAnimated(true);
    }

    public override void DidReceiveMemoryWarning ()
    {
        // Releases the view if it doesn't have a superview.
        base.DidReceiveMemoryWarning ();

        // Release any cached data, images, etc that aren't in use.
    }

    #region View lifecycle

    public override void ViewDidLoad ()
    {
        base.ViewDidLoad ();

        // Perform any additional setup after loading the view, typically from a nib.
        AddButton.Clicked += (sender, e) => {
            CreateTask ();
        };
    }


    public override void ViewWillAppear (bool animated)
    {
        base.ViewWillAppear (animated);

        // bind every time, to reflect deletion in the Detail view
        TableView.Source = new RootTableSource(chores.ToArray ());
    }

    public override void ViewDidAppear (bool animated)
    {
        base.ViewDidAppear (animated);
    }

    public override void ViewWillDisappear (bool animated)
    {
        base.ViewWillDisappear (animated);
    }

    public override void ViewDidDisappear (bool animated)
    {
        base.ViewDidDisappear (animated);
    }

    #endregion


}
}

using System;
using Foundation;
using UIKit;
using System.CodeDom.Compiler;

namespace StoryboardTable
{
    partial class TaskDetailViewController : UITableViewController
    {
        Chore currentTask {get;set;}
        public MasterViewController Delegate {get;set;} // will be used to Save, Delete later</p>

    public TaskDetailViewController (IntPtr handle) : base (handle)
    {

    }

    // when displaying, set-up the properties
    public override void ViewDidLoad()
    {
        base.ViewDidLoad ();

        SaveButton.TouchUpInside += (sender, e) => {
            currentTask.Name = TitleText.Text;
            currentTask.Notes = NotesText.Text;
            currentTask.Done = DoneSwitch.On;
            Delegate.SaveTask(currentTask);
        };
        DeleteButton.TouchUpInside += (sender, e) => {
            Delegate.DeleteTask(currentTask);
        };
    }

    public override void ViewWillAppear (bool animated)
    {
        base.ViewWillAppear (animated);
        TitleText.Text = currentTask.Name;
        NotesText.Text = currentTask.Notes;
        DoneSwitch.On = currentTask.Done;
    }

    // this will be called before the view is displayed
    public void SetTask (MasterViewController d, Chore task) {
        Delegate = d;
        currentTask = task;
    }
}
}