type returned by ResourceGroupManager->listResourceNames

Hi, I'm starting with OgreDotNet and I wonder how to manage returned value by this call :
OgreDotNet.ResourceGroupManager.getSingleton().listResourceNames(groupname);
Visual studio says it is waiting for type :
OgreDotNet.SWIGTYPE_p_Ogre__SharedPtrTstd__vectorTstd__string_t_t
But then how do I iterate and get access to each string in this pseudo vector ??
Thanks for any help !