读取txt文本到DataTable中

System.Data.OleDb.OleDbConnection cn = new System.Data.OleDb.OleDbConnection();
String folder = "K:\\share\\";
String sql = "select * from test.txt";
cn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + folder + ";Extended Properties=\"Text;HDR=No;FMT=Delimited\"";
System.Data.OleDb.OleDbDataAdapter ad = new System.Data.OleDb.OleDbDataAdapter(sql, cn);
System.Data.DataTable dt = new DataTable();
ad.Fill(dt);
String result = "";
for (int i = 0; i < dt.Rows.Count; i++)
{
     
  for (int m = 0; m < dt.Columns.Count; m++)
  {
    result += dt.Rows[i][m].ToString() + " -- ";
  }
  result += Environment.NewLine;
}
MessageBox.Show(result);