when I compile my program I get "fatal error C1506: unrecoverable block
scoping error". Can anyone tell me why? Thank you very much in advance.

namespace unManaged
{
template<class L>
class Mytemplate : public myUnManagedClassA
{
};
__nogc class A : public OD_myUnManagedClassB
{
};
__nogc class B : public ODN_Mytemplate<A>
{
};
}