Name = Thomas
Hair Color = Blonde
etc...

Name
Thomas
Hair Color
Blond

using (StreamWriter tw = new StreamWriter(openFileDialog1.FileName))
          {
            for (int row = 0; row < dgvParam.Rows.Count - 1; row++)
          {
              for (int col = 0; col < dgvParam.Rows[row].Cells.Count; col++)
                {
                  StringBuilder sb = new StringBuilder();
                   if (!String.IsNullOrEmpty(sb.ToString()))
                            sb.Append("=");  //any delimiter you choose
                        sb.Append(dgvParam.Rows[row].Cells[col].Value.ToString().ToUpper());
                    tw.WriteLine(sb.ToString());
                }