string path;

  public static string Encrypt(UserPasswordFormat format, string cleanString, string salt)
  {
   Byte[] clearBytes;
   Byte[] hashedBytes;
   Encoding encoding = Encoding.GetEncoding("unicode");
   clearBytes = encoding.GetBytes(salt.ToLower().Trim() + cleanString.Trim());

   hashedBytes = ((HashAlgorithm) CryptoConfig.CreateFromName("MD5")).ComputeHash(clearBytes);

     return BitConverter.ToString(hashedBytes);
     ;                     
   
  }
  public static Common GetConfig()
  {
   Common config = cache.Get(CacheKey) as Common;
   if(config == null)
   {
    string path;
    if(HttpContext.Current != null)
     path = HttpContext.Current.Server.MapPath("~/Forums.config");
    else
     path = Directory.GetCurrentDirectory() + Path.DirectorySeparatorChar + "Forums.config";

    XmlDocument doc = new XmlDocument();
    doc.Load(path);
    config = new Common(doc);
    cache.Insert(CacheKey,config,new CacheDependency(path),DateTime.MaxValue,TimeSpan.Zero,CacheItemPriority.AboveNormal,null);

    //cache.ReSetFactor(config.CacheFactor);
   }
   return config;
           
  }