How To Get Id Or Any User Details In Session After I Click On Logout Button

#region Events
       /// <summary>
       /// The page losd event of Site master page.
       /// </summary>
       /// <param name="sender">The object sender.</param>
       /// <param name="e">The event arguments.</param>
       protected void Page_Load(object sender, EventArgs e)
       {
           if (Session[KaizenConstants.CURRENTLOGGEDINUSER] == null)
           {
               Response.Redirect("Login.aspx");
           }


           if (!IsPostBack)
           {
               if (Session[KaizenConstants.CURRENTLOGGEDINUSER] == null)
               {
                   UserManagementController userManagementController = new UserManagementController();
                   IUserEntity user = UserManagementEntityCreator.GetUserEntity();
                   string userName = HttpContext.Current.User.Identity.Name;
                   user.NetworkId = userName.Substring(userName.IndexOf("\\") + 1);
                   currentUserID = user.NetworkId;
                   Result result = userManagementController.Get(user);
                   user = result.Entity as IUserEntity;

                   if (user.Id > 0)
                   {
                       Session[KaizenConstants.CURRENTLOGGEDINUSER] = result.Entity;
                   }
                   else
                   {
                       Response.Redirect("QCError.aspx");
                   }
               }
           }

       }

$(function () {
               $('#logButton').click(function () { Logout(); });
           });

           function Logout() {
               debugger;
               var currenturl = window.location.href;
               $.ajax({
                   url: currenturl + '/Logout',
                   type: 'POST',
                   contentType: 'application/json; charset=utf-8',
                   dataType: "json",
                   success: function (result) {
                       window.open('', '_self', '');
                       window.close();
                   },
                   error: function (error) {
                       window.open('', '_self', '');
                       window.close();
                   },
                   async: false
               });
           }