Template class to make IEnumerator type-safe in C++

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This is my current version. Comments are welcome.
(yes, I removed the previous posts as I did not want to fill this blog with “ Here is verssio n“... Sorry.)

class EnumeratorBase

{

public:

bool MoveNext() { return m_e->MoveNext() ; }

void Reset() { return m_e->Reset() ; }

protected:

EnumeratorBase( System::Object * o ) : m_e(static_cast<System::Collections::IEnumerable *>(o)->GetEnumerator()) {}

protected:

gcroot< System::Collections::IEnumerator * > m_e ;

} ;

template <typename T>

class Enumerator : public EnumeratorBase

{

public:

Enumerator( System::Object * o ) : EnumeratorBase(o) {}

T * get_Current() { return __try_cast<T*>(m_e->get_Current()) ; }

} ;

template <typename T>

class ValueEnumerator : public EnumeratorBase

{

public:

ValueEnumerator( System::Object * o ) : EnumeratorBase(o) {}

T __box * get_Current() { return dynamic_cast<T __box *>(m_e->get_Current()) ; }

} ;