public bool InviteForEvent(string eventId, ICustomer customer)
{
var eventInQuestion = events.GetEvent(eventId);
if (eventInQuestion == null)
{
throw new EventNotFoundException(eventId);
}
var invite = new Invitation(this, eventInQuestion);
invite.AddCustomerToListofInvitees(customer);
customer.AddMyInvitations(invite);
return(true);
}