/// <summary>
/// Rename a column.
/// </summary>
/// <param name="index">The column index.</param>
/// <param name="newName">The new name.</param>
public void RenameColumn(int index, String newName)
{
ColumnMapping.Remove(Columns[index].Name);
Columns[index].Name = newName;
ColumnMapping[newName] = Columns[index];
}