give me discription

Question

  #region Data Mamber
        VisitingThereEntities context = null;
        #endregion

        #region Cont'r
        public RpUser()
        {
            context = new VisitingThereEntities();
        }
        #endregion
        #region Clean Session Manager
        /// <summary>
        /// clean session manager after click change password
        /// and fore to re-login into the system.
        /// </summary>
        /// <param name="obj"></param>
        public void Logout()
        {
            SessionManager.userClearSession();
            //SessionManager.clearSession();
            SessionManager.userid = 0;

            SessionManager.userEmail = null;
            SessionManager.userName = null;
            SessionManager.userType = null;
        }
        #endregion

        #region Set Session Manager
        /// <summary>
        /// set session Manager details after login.
        /// </summary>
        private void SetSessionManager(User obj)
        {
            SessionManager.userid = obj.UserId;
            SessionManager.userEmail = obj.EmailId;
            SessionManager.userName = obj.FirstName;
            SessionManager.userType = obj.Type;
        }
        #endregion

        #region Login
        public UserViewModel Login(string emailId, string password)
        {
            var obj = context.Users.FirstOrDefault(u => u.EmailId == emailId && u.Password == password);
            if (obj != null)
            {
                //UserViewModel data = new UserViewModel()
                UserViewModel data = new UserViewModel()
                {
                    EmailId = obj.EmailId,
                    FirstName = obj.FirstName,
                    LastName = obj.LastName,
                    password = obj.Password,
                    UserId = obj.UserId,
                    Type = obj.Type
                };
                SetSessionManager(obj);
                return data;
            }
            else return null;
        }
        public UserViewModel UserAdd(UserViewModel obj)
        {
            User con = new User();

            //con.UserName = obj.UserName;
            con.FirstName = obj.FirstName;
            con.LastName = obj.LastName;
            //con.Type = obj.Type;
            con.EmailId = obj.EmailId;
            con.Password = obj.password;
            con.NewPassword = obj.NewPassword;
            con.ConformPassword = obj.confirmPassword;
            con.AgeId = obj.AgeId;
            con.Type = obj.Type;
            context.Users.AddObject(con);
            context.SaveChanges();
            obj.FirstName = con.FirstName;
            obj.LastName = con.LastName;
            obj.EmailId = con.EmailId;
            obj.password = con.Password;
            return obj;
        }
        #endregion