ajax.js

$.ajax({
          url: '@Url.Action("Tasks", "Inbox", new { area = string.Empty })',
          data: { userId : '@MyPrincipal.Current.Id' },
          cache: false,
          type: "GET",
          success: function (data) {
              $("#numberOfTaskListItems").html(data);
          },
          dataType: "json"
        });