/// <summary>Save the ".md5" file that lists the md5sum of another file.</summary>
/// <param name="dataFile">the original file whose md5 was computed</param>
/// <param name="digest">the computed digest</param>
/// <exception cref="System.IO.IOException"/>
public static void SaveMD5File(FilePath dataFile, MD5Hash digest)
{
string digestString = StringUtils.ByteToHexString(digest.GetDigest());
SaveMD5File(dataFile, digestString);
}