public static string SplitString(string input)
        {
            int chunkSize = 255;
            List<string> chunks = new List<string>();
            for (int i = 0; i < input.Length; i += chunkSize)
            {
                int remaining = Math.Min(chunkSize, input.Length - i);
                chunks.Add(input.Substring(i, remaining));
            }
            return string.Join("¦", chunks);
        }

            F.DataFields.FieldByName("ITEXT").Value = SplitString(description);