private void CacheValidation()
 {
     this._cachedValidation = (string)base[_propValidation];
     if (this._cachedValidation == null)
     {
         this._cachedValidation = "HMACSHA256";
     }
     this._cachedValidationEnum = MachineKeyValidationConverter.ConvertToEnum(this._cachedValidation);
     this._validationIsCached   = true;
 }