是否存在与RPC上下文句柄等效的WCF？

I'm updating an old C++ service to use WCF instead of RPC and there is an issue as to what type to use when sending and receiving a handle (HANDLE, void*..etc). In the updated service I currently have it using IntPtr, but this does not work when going from a 64 bit version of the service to a 32 bit version. The IntPtr can not deserialize because internally it is just a void* which will be different depending on which environment you run in.I'm updating an old C++ service to use WCF inst