Удаление дубликатов в stringlist'e - pascal

[AnGel]

I-var:

 procedure RemoveDuplicates(const stringList : TStringList) ;
var
   buffer: TStringList;
   cnt: Integer;
begin
   stringList.Sort;
   buffer := TStringList.Create;
   try
     buffer.Sorted := True;
     buffer.Duplicates := dupIgnore;
     buffer.BeginUpdate;
     for cnt := 0 to stringList.Count - 1 do
       buffer.Add(stringList[cnt]) ;
     buffer.EndUpdate;
     stringList.Assign(buffer) ;
   finally
     FreeandNil(buffer) ;
   end;
end;

Вызов процедуры:

RemoveDuplicates(StringList);

II-var

with StringList do
     begin
      Sorted := True;
      Duplicates := dupIgnore;
     end;