Форум программистов [Powered by Invision Power Board]

Код

public void SettingsFile_OnChanged(object sender, FileSystemEventArgs e)
        {
            WriteHashToSettingsFile(CalculateHash());            
        }

        public static string CalculateHash()
        {           
            StreamReader settingsFileReader = new StreamReader(XmlSettings.DefaultXmlSettingsFilePath); //Исключение, файл занят другим процессом
            string xmlStr = settingsFileReader.ReadToEnd();

            settingsFileReader.Close();

            StringBuilder buff = new StringBuilder();
            if (!string.IsNullOrWhiteSpace(xmlStr))
            {
                int startIndex = xmlStr.IndexOf("<Parameters>");
                int endIndex = xmlStr.IndexOf("<HashCode");

                string xmlStrToHash = xmlStr.Substring(startIndex, endIndex - startIndex);

                SHA1CryptoServiceProvider sha1 = new SHA1CryptoServiceProvider();
                sha1.ComputeHash(Encoding.UTF8.GetBytes(xmlStrToHash));

                byte[] hash = sha1.Hash;
                buff = new StringBuilder();
                foreach (byte hashByte in hash)
                {
                    buff.Append(String.Format("{0:X1}", hashByte));
                }
            }
            return buff.ToString();         
        }