AssertValid()
{
Debug.Assert(m_iN >= MinimumN);
Debug.Assert(m_iN <= MaximumN);
Debug.Assert( !String.IsNullOrEmpty(m_sWorksheetName) );
Debug.Assert( !String.IsNullOrEmpty(m_sTableName) );
Debug.Assert(m_sRankedColumnName != null);
Debug.Assert( !String.IsNullOrEmpty(m_sItemNameColumnName) );
}