How can I create a pdfclown document from a memory stream?

[dan parker]

I tried to
org.pdfclown.bytes.IInputStream inpus = null;
istream.Read(fb);

org.pdfclown.files.File file = new org.pdfclown.files.File(istream);
but it won't let me do that. I think this should be simple, i'm probably bad on my C# skills.