public override void Handle(Deposit command)
{
Contract.Assume(command != null);
Contract.Assume(command.Amount > decimal.Zero);
var accountAggregate = new AccountAggregateRoot();
var events = accountAggregate.Credit(command.Amount, new CanCreditAccount(CanCreditAccount));
Contract.Assume(Contract.ForAll(events, o => o != null));
_domainEventDispatcher.PublishAll(events);
}