gistfile1.cs

public class EditingSource : DialogViewController.Source
		{
			RecordsDialogViewController tvc = null;
			
			public EditingSource(RecordsDialogViewController dvc) : base(dvc)
			{
				tvc = dvc;	
			}
			
			public override bool CanEditRow (UITableView tableView, NSIndexPath indexPath)
			{
				return true; //indexPath.Section == 0;
			}
			
			public override UITableViewCellEditingStyle EditingStyleForRow (UITableView tableView, NSIndexPath indexPath)
			{
				if (tvc.Editing) 
				{
					return UITableViewCellEditingStyle.Delete;
				}
				return UITableViewCellEditingStyle.None;
				
			}
			
			public override void CommitEditingStyle (UITableView tableView, UITableViewCellEditingStyle editingStyle, NSIndexPath indexPath)
			{
				//
				// In this method, we need to actually carry out the request
				//
				
				//need to remove the item at indexPath.Row
				
				var section = Container.Root [indexPath.Section];
				var element = section [indexPath.Row];
				
// I have a custom Element - you could use StringElement or Element here.
				var recordElement = element as RecordsElement;
				if (recordElement != null)
				{
					//remove it from your database!--> TransactionWriter.Delete(recordElement.Transaction);		
					section.Remove (element);	
					if (section.Count == 0)
					{
						Container.Root.Remove(section);
					}
				}
			}
		}
		
		public override Source CreateSizingSource (bool unevenRows)
		{
			//if (unevenRows)
			//	throw new NotImplementedException ("You need to create a new SourceSizing subclass, this sample does not have it");
			return new EditingSource (this);
		}