// Wrap the event in a protected virtual method
// to enable derived classes to raise the event.
public virtual void RaiseNewArtefactEvent(Artefact artefact)
{
Artefacts.Add(artefact.ProperName, artefact);
// Raise the event by using the () operator.
NewArtefactEvent(this, new NewArtefactEventArgs(artefact));
}
public NewArtefactEventArgs(Artefact artefact)
{
this.artefact = artefact;
}