private bool IsEnableUser(IEventAggregator eventAgg, IPermission permission)
{
var query =
from current in this.Context.CurrentUser.ToMaybe()
from name in current.UserName.ToMaybe()
from user in
(from u in eventAgg.GetEvent<GetUserEvent>().Get(x => x.Id.Equals(name))
select u).FirstOrNothing()
where permission.IsPermittedDelete(user)
select true;
return
query.IsSomething;
}