ex: 
System.ArgumentException: Item has already been added. Key in dictionary: 'sOdPqaAH'  Key being added: 'sOdPqaAH'
   at System.Collections.SortedList.Add(Object key, Object value)
   at CatIA.Thes.ListColumnsTerms(String strWhere) in C:\Users\enrique\source\repos\catia\CatIA\thes.aspx.vb:line 1507