public ActionResult GetAssignmentAssignedTo(SearchAssignmentStatusByUser search)
        {
            ValidateSearchCriteria(search);
            var result = AssignmentService.GetAssignmentAssignedTo(search);

            result.Insert(0, new AssignedToUser
            {
                UserID   = Convert.ToInt32(-1),
                FullName = "All"
            });

            return(PartialView("Search/_AssignmentAssignedTo", result));
        }