Using C's fread/fwrite with File objects

[pineapple via Digitalmars-d-learn]

I'd like to use fread and fwrite in place of File.rawRead and 
File.rawWrite which force the creation of an array where I'd 
rather specify a buffer location and length. I'd like to do this 
using a File object but the handle for the C stream is a private 
member and I can't find any way to access it. Is there a getter 
or something I missed, or else some way to pry private data like 
this out of a class?