It is a bit off-topic, but I hoped you would not mind. Is the following correct?

C#:

Int32 val = Thread::VolatileRead(ref valueToRead);

C++:

long val;
::InterlockedExchange(&val, valueToRead);



C#:

Int32 val;
Thread::VolatileWrite(&val, valueToWrite);

C++:

long val;
::InterlockedExchange(&val, valueToWrite);