public override bool Equals(IForeignUser other)
{
return
(!ReferenceEquals(null, other) &&
other is FacebookUserData &&
Id.Equals(((FacebookUserData)other).Id));
}
public void AddContact(IForeignUser data)
{
if (!_foreignContacts.Contains(data))
{
_foreignContacts.Add(data);
}
}
public abstract bool Equals(IForeignUser other);
