How to get original file name from a byte array (contains file from Mac or Windows)

Question

I have a web method that receives a byte array of a file that is uploaded.  It can be a Windows file or a Mac file.
I would like to find out what the original file name is somehow.  I thought this would be possible maybe either by:
1) Getting the original filename from inside the byte array (Byte []) or
2) Writing the file as is to the local physical disk and then reading the file name via Path.GetFileName().  However the method File.WriteAllBytes requires a FileName !  I would like to use the default file name and just set the Path.

I am stumped on this one.

Answer 1

It is not possible. The information is not there to be discovered. Whatever method asked the user to enter a local file path has to pass the filename in addition to the file content.