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string constr = "User Id=rpms;Host=localhost;Database=school;password=123";
MySqlConnection mycn = new MySqlConnection(constr);
mycn.Open();
MySqlCommand mycm = new MySqlCommand("select Code from person", mycn);
MySqlDataAdapter msda = new MySqlDataAdapter("select Code from person", mycn);
DataSet ds = new DataSet();
msda.Fill(ds);
mycn.Close();