Writing a DataTable into a text file in asp.net c#

    public void Writewowfileintxt(DataTable dt, string filePath)

    {

        int i = 0;

        StreamWriter sw = null;

        try

        {

            TextInfo UsaTextInfo = new CultureInfo("en-US", false).TextInfo;

            sw = new StreamWriter(filePath, false);

            DataTable dtcolunm = clsd.getTablecolumn(tablename);

            for(i = 0; i < dt.Columns.Count - 1; i++)

                {

                    sw.Write(dt.Columns[i].ColumnName + ” | ”);

                }

                sw.Write(dt.Columns[i].ColumnName);

                sw.WriteLine();

            char[] charsToTrim = { ' ' };

            foreach (DataRow row in dt.Rows)

            {

                object[] array = row.ItemArray;

                for (i = 0; i < array.Length - 1; i++)

                {

       sw.Write(array[i].ToString);                       

                }

                sw.Write(array[i].ToString);

                sw.WriteLine();

            }

            sw.Close();

        }

        catch (Exception ex)

        {

        }

    }