public virtual void AddExternalReference(ExternalUserReference reference)
{
Guard.ArgumentNotNull(x => reference);
if (!ExternalReferences.Contains(reference))
ExternalReferences.Add(reference);
if (reference.User != null)
reference.User.RemoveExternalReference(reference);
reference.User = this;
}
public virtual void RemoveExternalReference(ExternalUserReference reference)
{
if (ExternalReferences.Contains(reference))
ExternalReferences.Remove(reference);
reference.User = null;
}
