public static int InsertSharedStringItem(string text, pkg.SharedStringTablePart shareStringPart)

         {

             if (shareStringPart.SharedStringTable == null)

             {

                 shareStringPart.SharedStringTable = new DOS.SharedStringTable();

             }

             int i = ;

             foreach (DOS.SharedStringItem item in shareStringPart.SharedStringTable.Elements<DOS.SharedStringItem>())

             {

                 if (item.InnerText == text)

                 {

                     return i;

                 }

                 i++;

             }

             shareStringPart.SharedStringTable.AppendChild(new DOS.SharedStringItem(new DOS.Text(text)));

             shareStringPart.SharedStringTable.Save();

             return i;

         }