Is it impossible to implement ICurrencyManagerProvider outside System.Windows.Forms namespace?

Hello

I have read the source code of the classes BindingSource and CurrencyManager. Since the constructor of the CurrencyManager is not exposed (it is declared as Internal), is it possible to effectively implement the interface ICurrencyManagerProvider? Besides the class BindingSource, is there another implementation of the referred interface?

namespace System.Windows.Forms {

    ...

    public class CurrencyManager : BindingManagerBase {


        internal CurrencyManager(Object dataSource) {
            SetDataSource(dataSource);
        }

   ...

   }

}

Thanks a lot.