Display Message(Saved Successfully) and Pass session to another page in ASP.Net

onclick of save button pass session to another page in asp.net c#

that time Message Not Show And Session Passing CodeDelete then Message show Properly.

cmd.ExecuteNonQuery(); ShowMessaage(" Record Added SucessFully !!!");

Session["LastName"] = txtlName.Text;

Response.Redirect("Default2.aspx");

btnsave Onclick display Message("Saved Successfully ") Pass session to another page ????????