PurplePen.PdfMapFile.CalculateSha1 C# (CSharp) Method

        internal string CalculateSha1(string path)
        {
            var hashAlgorithm = System.Security.Cryptography.SHA1.Create();
            byte[] hash = hashAlgorithm.ComputeHash(File.ReadAllBytes(path));
            hash[0] ^= 0xe9;   // Change hash so different from previous (GhostScript)
            return Hexify(hash);
        }