序列化对象时如何加密所选属性？

我的解决方案：

    public string PasswordEncrypted { get; set; }    [JsonIgnore]    public string Password    {        get        { var encrypted = Convert.Frombase64String(PasswordEncrypted); var data = ProtectedData.Unprotect(encrypted, AdditionalEntropy, DataProtectionScope.LocalMachine); var res = Encoding.UTF8.GetString(data); return res;        }        set        { var data = Encoding.UTF8.GetBytes(value); var encrypted = ProtectedData.Protect(data, AdditionalEntropy, DataProtectionScope.LocalMachine); PasswordEncrypted = Convert.Tobase64String(encrypted);        }

（可以减少冗长）