writing a CSV file with proper formatting of columns headers and rows

private static void CreateCSVFile(DataTable dt, string strFilePath, string webServerFileLink)
{
   // Create the CSV file to which grid data will be exported.
   StreamWriter sw = new StreamWriter(strFilePath, false);

   // First we will write the headers.              
   int iColCount = dt.Columns.Count;

   for (int i = 0; i < iColCount; i++)
   {
      sw.Write(dt.Columns[i]);
      if (i < iColCount - 1)
      {
         sw.Write(",");
      }
   }

   sw.Write(sw.NewLine);

   // Now write all the rows.
   foreach (DataRow dr in dt.Rows)
   {
      for (int i = 0; i < iColCount; i++)
      {
         if ((!Convert.IsDBNull(dr[i])) && (i == 7))
         {
            sw.Write(dr[i].ToString().Replace("\r", " "));
         }
         else
         {
            sw.Write(dr[i].ToString().Replace(",", " "));
         }

         if (i < iColCount - 1)
         {
            sw.Write(",");
         }
      }

      sw.Write(sw.NewLine);
   }

   sw.Close();
}