[WorksheetAttribute(Title = "Books")]
public class Book: IRecordModel
{
    [ColumnHeader(Index = 10, IsVisible = false)]
    public int Id { get; set; }

    [ColumnHeader(Index = 20, Text = "Name", Width = 150)]
    public string Title { get; set; }

    [ColumnHeader(Index = 30)]
    public string Author { get; set; }

    [ColumnHeader(Index = 35, Text = "Type")]
    public BindingType BindingType { get; set; }

    [ColumnHeader(Index = 36, Text = "OnSale")]
    public bool IsOnSale { get; set; }

    [NumberFormat(DecimalPlaces = 2)]
    [ColumnHeader(Index = 40)]
    public decimal Price { get; set; }

    [DateTimeFormat( CultureName = "en-US")]
    [ColumnHeader(Index = 45, Text = "Publish Date", Width = 200)]
    public DateTime Pubdate { get; set; }

    public int RowIndex { get; set; }
}

private ObservableCollection<IRecordModel> _Books;
private WorksheetModel _WorksheetModel;

_Books = new ObservableCollection<IRecordModel>();
for (int i = 0; i < 10; i  )
{
    Book book = new Book();
    book.Id = i;
    book.Title = string.Format("Title {0}", i);
    book.Author = string.Format("Author {0}", i);
    book.BindingType = BindingType.Hardback;
    book.IsOnSale = true;
    book.Price = (decimal)(i * 10.1);
    book.Pubdate = DateTime.Now;
    _Books.Add(book);
}
// reoGridControl is the ReoGridControl control instance
_WorksheetModel = new WorksheetModel(reoGridControl, typeof(Book), _Books);
//If you want to check the validity of the input variables, you can implement the function.
_WorksheetModel.OnBeforeChangeRecord  = OnBeforeChangeRecord;

private bool? OnBeforeChangeRecord(IRecordModel record, PropertyInfo propertyInfo, object newValue)
{
    if (propertyInfo.Name.Equals("Price"))
    {
        decimal price = Convert.ToDecimal(newValue);
        if (price > 100m) //assume the max price is 100
        {
            MessageBox.Show("Max price is 100.", "Alert", MessageBoxButton.OK, MessageBoxImage.Warning);
            return true; // cancel the change
        }
    }
    return null;
}

// add a book
int count = _Books.Count;
Book book = new Book();
book.Id = count;
book.Title = string.Format("Title {0}", count);
book.Author = string.Format("Author {0}", count);
book.BindingType = BindingType.Hardback;
book.IsOnSale = true;
book.Price = (decimal)(count * 10.11) > 100m ? 100m :(decimal)(count * 10.11);
book.Pubdate = DateTime.Now;
_Books.Add(book);

// remove a book
if (_Books.Count > 0)
{
    _Books.RemoveAt(_Books.Count - 1);
}

// move a book
if (_Books.Count > 2)
{
    _Books.Move(0, _Books.Count - 1);
}

// edit a book
(_Books[0] as Book).Price = new Random(DateTime.Now.Millisecond).Next(1,100);
// invoke UpadteRecord after editing one record.
_WorksheetModel.UpadteRecord(_Books[0]);