/// <summary>
/// Sets the group number of the currently selected columns to <code>nGroup</code>.
/// </summary>
/// <param name="datacoll">The data column collection to which to apply this procedure.</param>
/// <param name="selected">Collection of column indices for which to set the group number.</param>
/// <param name="nGroup">The group number to set for the selected columns.</param>
public static void SetColumnGroupNumber(this DataColumnCollection datacoll, IAscendingIntegerCollection selected, int nGroup)
{
for (int i = 0; i < selected.Count; i++)
{
datacoll.SetColumnGroup(selected[i], nGroup);
}
}
