Inherited Members are hidden with an ObjectDataSource

Hi, I hope this is the right forum to post this question... from what I read I think it is.

Edit : This is the third time that the moderators move my post from forum to forum... I am aware that this is not VB-related at all, but my post was moved here.

I have the following structure :

- An IDictionaryView<T, U> interface which defines a function called "Count"
- An IWritableDictionaryView<T, U> interface which extends IDictionaryView<T, U> with a couple of methods
- A DictionaryEx<T, U> class which implements IWritableDictionaryView<T, U>
- A Test class which holds a private instance of DictionaryEx<T, U> (the actual types do not matter here), with a property that exposes it publically (read/write)

I have an ObjectDataSource that points on the Test class.
Here are the scenarios, with the problematic one :

- If the public property in Test exposes the DictionaryEx instance as a IDictionaryView<T, U> by down-casting it, the "Data Source" tab shows the "Count" member as expected.
- If the public property in Test exposes the DictionaryEx instance as a IWritableDictionaryView<T, U> also with a down-cast, the "Data Source" tab does NOT show the "Count" member even though it's implemented via inheritance.

My question is... why The member is there, and if I duplicate it in IWritableDictionaryView<T, U>, the compiler complains that I should use "new" if I want to shadow it... which I do not want to do. Although by duplicating it, the member appears in Data Sources.

Is this by design What is the best way to overcome this problem

Thanks!