public ActionResult AssignUsers(int Id)
        {
            var project = db.Projects.Find(Id);
            var user    = new AssignUsersToProjVM();

            user.Id            = Id;
            user.userList      = new MultiSelectList(db.Users, "Id", "FirstName", user.selectedUsers);
            user.projectName   = project.Name;
            user.selectedUsers = projectHelper.ListUsersInProject(project.Id).ToList();
            return(View(user));
        }