void SignFranchiseAgreement(DateTime signingDate)
{
if (string.IsNullOrEmpty(this.Entity.TaxId))
{
throw new InvalidOperationException("Cannot sign agreement without a tax id.");
}
var @event = new FranchiseAgreementSigned(this.Entity.ID, signingDate);
this.Entity.Apply(@event);
}
public void Apply(FranchiseAgreementSigned @event)
{
this.AgreementSigned = true;
this.DateOfFormation = @event.SignedOnDate;
}