public void AddExternalLogin(string provider, string providerKey)
{
if (string.IsNullOrEmpty(provider))
throw new ArgumentNullException("provider");
if (string.IsNullOrEmpty(providerKey))
throw new ArgumentNullException("providerKey");
if (Accounts != null && Accounts.Any() && Accounts.Any(x => x.Provider.Equals(provider) && x.ProviderKey.Equals(providerKey))) {
throw new DomainException("User already contains a login for provider {0}.", provider);
}
var @event = new ExternalAccountAddedEvent(provider, providerKey);
RaiseEvent(@event);
}
void OnExternalAccountAdded(ExternalAccountAddedEvent @event)
{
var account = new Account(@event.Provider, @event.ProviderKey);
Accounts.Add(account);
}