>>>I tried using:
>>>

>>>  public class BaseObject
>>>    {
>>>        private BaseObject() { }
>>>    }
>>>

>>>to prevent other developers directly creating an instance of the class. I was hoping to sub-class from this and have the behaviour inherited by these classes. Seems that's not possible - in fact I can't sub-class from BaseObject at all because 'BaseObject is inaccessible due to it's protection level'. Any other way to achieve what I need (I don't like the idea of having to put private constructors in all the leaf classes)
>>>
>
>>Wouldn't 'protected' in base do what you want?
>
>Do you mean 'protected BaseObject(){}'?
>That doesn't prevent creation of the object.... :-{
>Thx,
>Viv

Yes but even private/internal ones could be created anyway. Protected/private/internal at least puts some control over it.
Cetin