VB.net JSON DeserializeObject错误BC30203

Question

I'm using the Newtonsoft.dll to create a Settings.json file. I have a class that represents the settings, which i serialize upon saving and deserialize when loading the application. Everything is working great and fast except for one thing.

The settings class contains an .NET object called SpeechSynthesizer . When the settings is deserialized i get an BC30203: Identifier expected at the Voice child object of the SpeechSynthesizer . This causes the deserialized returning the default `Voice' (Anna) settings instead of the saved one's (Serializing the setting object does work as it should) The settings of the object before this child object are properly deserialized.

The JSON:

  {      ......
  "Speech": {
    "State": 0,
    "Rate": -3,
    "Volume": 67,
    "Voice": {
      "Gender": 1,
      "Age": 30,
      "Name": "IVONA 2 Ruben",
      "Culture": "nl-NL",
      "Id": "IVONA 2 Voice Ruben22",
      "Description": "IVONA 2 Ruben - Dutch male voice [22kHz]",
      "SupportedAudioFormats": [],
      "AdditionalInfo": {
        "Language": "413",
        "Name": "IVONA 2 Ruben",
        "Age": "Adult",
        "Gender": "Male",
        "Vendor": "IVONA Software Sp. z o. o."
      }
    }
  }

Deserialize Code:

Return JsonConvert.DeserializeObject(Of Settings)(File.ReadAllText(settingsfile))

Serialize Code:

    Using _file As StreamWriter = New StreamWriter(SettingFilePath)
        Dim serializer As New JsonSerializer()
        serializer.Formatting = Formatting.Indented
        serializer.Serialize(_file, Me)
    End Using

Settings Code:

''' <summary>
''' Get or Set the properties that is used for the SpeechSynthesizer
''' </summary>
''' <returns></returns>
Public Property Speech As SpeechSynthesizer

Image of the error

Answer 1

The answer to my question was, as Mark pointed out, the object was ReadOnly Meaning it couldn't Deserialize during application startup Deserializing

The work arround is by adding a extra setting i called SelectedVoice As a string. Upon startup i use the SpeechSynthesizer.SelectVoice(_Settings.SelectedVoice) To load the voice that was set by the user.