public void AddColumn(Column value)
{
if (value == null)
throw new ArgumentNullException("value");
if (RowCount > 0)
throw new InvalidOperationException("Unable to add new columns once rows have been created.");
ColumnsList.Add(value);
}
public string this[Column column]
{
get { return Values.Single(n => n.Column == column).Value; }
set { Values.Single(n => n.Column == column).Value = value; }
}