public ActionResult AssignUsers(int id)
        {
            Project             project = db.Projects.Find(id);
            ProjectAssignHelper helper  = new ProjectAssignHelper();
            var projectUser             = new ProjectUserViewModel();

            projectUser.Project       = project;
            projectUser.Id            = project.Id;
            projectUser.Name          = project.Name;
            projectUser.Users         = db.Users.ToList();
            projectUser.SelectedUsers = helper.ListProjectUsers(projectUser.Id).Select(p => p.Id).ToArray();
            projectUser.ProjectUsers  = new MultiSelectList(db.Users, "Id", "LastName", projectUser.SelectedUsers);

            return(View(projectUser));
        }