Session รับค่าไปแสดงอีกหน้าแล้ว insert ลง DB

int intNumbRows = 0;
       sql = "select count * From Register where FirstName ='" + this.TxtName.Text + "' AND LastName ='" + this.TxtLast.Text + "' ";
       cm = new SqlCommand(sql, con);
       intNumbRows = Convert.ToInt32(cm.ExecuteScalar());

       if (intNumbRows > 0)
       {
           Session["FirstName"] = this.TxtName.Text; this.Session["lastName"] = this.TxtLast.Text;
           Response.Redirect("Edit_delete.aspx");