public bool ComputeFileHash()

in DiagManager/DiagClasses/PackageMgr.cs [480:529]
44 lines of code
6 McCabe index (conditional complexity)

        public bool ComputeFileHash (string filepath, out string hashString)
        {
            hashString = "";

            if (File.Exists(filepath))
            {
                // Initialize a SHA256 hash object.
                using (SHA512 mySHA512 = SHA512.Create())
                {
                    // Compute and print the hash values for each file in directory.
                    try
                    {
                        // Create a fileStream for the file.
                        FileStream fileStream = File.OpenRead(filepath);
                        // Be sure it's positioned to the beginning of the stream.
                        fileStream.Position = 0;
                        // Compute the hash of the fileStream.
                        byte[] hashValue = mySHA512.ComputeHash(fileStream);

                        //convert the byte value to a string and remove "-" inside of the string
                        hashString += BitConverter.ToString(hashValue).Replace("-", ""); ;

                        Logger.LogInfo($"The file hash value for '{filepath}' is: {hashString}");

                        // Close the file.
                        fileStream.Close();
                    }
                    catch (IOException e)
                    {
                        Logger.LogInfo($"I/O Exception: {e.Message}");
                        hashString = "I/O Exception: " + e.Message;
                        return false;
                    }
                    catch (UnauthorizedAccessException e)
                    {
                        Logger.LogInfo($"Access Exception: {e.Message}");
                        hashString = "Access Exception: " + e.Message;
                        return false;
                    }
                }
            }

            else  //file does not exist
            {
                Logger.LogInfo("The file specified could not be found.");
                hashString = "Failed to create hash because .zip file was not found. Examine the log for details";
            }

            return true;
        } //end ComputeFileHash