public static DatabaseRoleViewModel AddUsersWithPermissions(this DatabaseRoleViewModel role, IEnumerable<DbUser> roles)
 {
     role.Users = (from r in roles select r.ToViewModel().ApplyPermissions(r.Permissions.ToList())).ToList();
     return role;
 }
 public static DatabaseRoleViewModel ApplyPermissions(this DatabaseRoleViewModel role, IEnumerable<DbPermission> permissions)
 {
     role.Permissions = (from p in permissions select p.ToViewModel()).ToList();
     return role;
 }