JSON.NET ignores all my properties without JsonProperty attribute

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I have a GameBoard class, which has 2 methods for saving and loading:

    public void Save(string pFilePath)
    {
        var s = JsonConvert.SerializeObject(this);
        System.IO.File.WriteAllText(pFilePath, s);
    }

    public static GameBoard Load(string pFilePath)
    {
        var s = System.IO.File.ReadAllText(pFilePath);
        return JsonConvert.DeserializeObject<GameBoard>(s);
    }

The Save method works great, and this is the content:

{"Width":3,"Height":3,"Cells":[[{"Content":0,"Ball":null,"Target":null},{"Content":0,"Ball":null,"Target":null},{"Content":0,"Ball":null,"Target":null}],[{"Content":0,"Ball":null,"Target":null},{"Content":0,"Ball":null,"Target":null},{"Content":0,"Ball":null,"Target":null}],[{"Content":0,"Ball":null,"Target":null},{"Content":0,"Ball":null,"Target":null},{"Content":0,"Ball":null,"Target":null}]],"WallSurrounded":true}

However, when I use Load method with the same file, all my properties are either null or default values (0 for ints).

I have to add [JsonProperty] to each of my property for it to work properly. I have used Json.NET before, and I remember that I didn't have to add any attribute. Is this intent change from Json.NET (I just get 6.0.6 from Nuget for this new project), or I did something wrong?

asked 31 secs ago

DatVM

2,195

JSON.NET ignores all my properties without JsonProperty attribute