How to convert an MD5 hash to a string and use it as a file name

Question

I am taking the MD5 hash of an image file and I want to use the hash as a filename.

How do I convert the hash to a string that is valid filename?

EDIT: toString() just gives "System.Byte[]"

Answer 1

How about this:

string filename = BitConverter.ToString(yourMD5ByteArray);

If you prefer a shorter filename without hyphens then you can just use:

string filename =
    BitConverter.ToString(yourMD5ByteArray).Replace("-", string.Empty);