11.cs

void IEventProvider.LoadFromHistory(IEnumerable<IDomainEvent> domainEvents)
{
    if (domainEvents.Count() == 0)
        return;

    foreach (var domainEvent in domainEvents)
    {
        apply(domainEvent.GetType(), domainEvent);
    }

    Version = domainEvents.Last().Version;
    EventVersion = Version;
}

12.cs

namespace Fohjin.DDD.EventStore
{
    public interface IEntityEventProvider 
    {
        void Clear();
        void LoadFromHistory(IEnumerable<IDomainEvent> domainEvents);
        void HookUpVersionProvider(Func<int> versionProvider);
        IEnumerable<IDomainEvent> GetChanges();
        Guid Id { get; }
    }
}

13.cs

namespace Fohjin.DDD.EventStore
{
    public interface IRegisterEntities
    {
        void RegisterEntityEventProvider(IEntityEventProvider entityEventProvider);
    }
}

14.cs

void IRegisterEntities.RegisterEntityEventProvider(IEntityEventProvider entityEventProvider)
{
    entityEventProvider.HookUpVersionProvider(GetNewEventVersion);
    _entityEventProviders.Add(entityEventProvider);
}

15.cs

namespace Fohjin.DDD.Domain
{
    public class EntityList<TEntity> : List<TEntity> where TEntity : IEntityEventProvider
    {
        private readonly IRegisterEntities _aggregateRoot;

        public EntityList(IRegisterEntities aggregateRoot)
        {
            _aggregateRoot = aggregateRoot;
        }

        public new void Add(TEntity entity)
        {
            _aggregateRoot.RegisterEntityEventProvider(entity);
            base.Add(entity);
        }
    }
}

16.cs

private void registerEvents()
{
    // Registration of Aggregate Root event handlers

    RegisterEvent<BankCardWasReportedStolenEvent>(onAnyEventForABankCard);
    RegisterEvent<BankCardWasCanceledByCLientEvent>(onAnyEventForABankCard);
}

private void onAnyEventForABankCard(IDomainEvent domainEvent)
{
    IEntityEventProvider bankCard;
    if (!_bankCards.TryGetValueById(domainEvent.AggregateId, out bankCard))
        throw new NonExistingBankCardException("The requested bank card does not exist!");

    bankCard.LoadFromHistory(new[] { domainEvent });
}