Cannot Convert Table to Table

Hey,

I created a generic type called: Table<T>, and I create an instance of him using T as 'OrderItem' element.

Now I need to set him into other instance that should suppot multiple types, so I decided to use object:

        private Table<object> currentTable;

Now I'm trying to set the OrderItem table, to the Object table:

 currentTable = mainWindow.OrderItemTable;

And I'm getting this error:

"Cannot implicitly convert type 'BusinessLogic.Table<Entities.OrderItem>' to 'BusinessLogic.Table<object>'".

OrderItem isnt implement IConvertible, so I can't use ConvertType, also casting isn't working.

Any suggestions?

Thanks.