Vista - Marshalling ArrayList

Hi,

I have a struct as follows:

[StructLayout(LayoutKind::Sequential,CharSet=CharSet::Ansi)]
public __gc struct STTemp
{
public:
int someint;
System::Collections::ArrayList* arrTemp;
};

Now, i want to marshal this strcuture so that the arraylist gets
marshalled properly...
But i dont understand how to use the "MarshalAl" attribute in the case
of arraylist....

Any help will be appreciated...

Thanks in advance...
Saad.