navigating between 2 master pages

    SqlConnection con=new SqlConnection(@"Data Source=ashish-pc\;Initial Catalog=HMS;Integrated Security=True");
    con.Open();
    SqlCommand cmd = new SqlCommand("select * from Login where UserName=@UserName and Password=@Password", con);
    cmd.Parameters.AddWithValue("@UserName", UserName.Text.Trim() );
    cmd.Parameters.AddWithValue("@Password", Password.Text.Trim());

    SqlDataAdapter da = new SqlDataAdapter();
    da.SelectCommand = cmd;
   // DataSet dt = new DataSet();
    DataTable dt = new DataTable();
    da.Fill(dt);
    if (dt.Rows.Count>0)
    {
        Session["UserName"] = UserName.Text;
        Session.Timeout = 10;
        if (dt.Rows[0]["SuperUser"].ToString() == "True")
        {
            Response.Redirect("/Home.aspx");
        }


        else
        {
            Response.Redirect("/Appointment.aspx");

        }


    }
    else
    {
         Response.Write("Invalid username and password");
    }
    con.Close();
}