JsonConvert.DeserializeObject throws an Error after using the result from JsonConvert.SerializeObject

When I use Newtonsoft.Json in C#, I find a problem like this

var dataDict = new Dictionary<string, List<double>>();

dataDict["$id"] = new List<double>() { 0.1, 0.9 };

var jsonStr = JsonConvert.SerializeObject(dataDict);

var back = JsonConvert.DeserializeObject<Dictionary<string, List<double>>>(jsonStr);

Then it throws error

Newtonsoft.Json.JsonSerializationException: ‘Unexpected token when
deserializing object: Float. Path ‘$id[0]’, line 1, position 11.’

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If I remove the charater "$", it works.

I acknowledge "$" is a speical token, my question: if you can SerializeObject, why you can not DeserializeObject?

Any work around here? Any advice is welcome! Thanks.

>Solution :

You can configure Json.NET to ignore metadata properties (properties prefaced by ‘$’) by passing JsonSerializerSettings to your deserialize operation.

var back = JsonConvert.DeserializeObject<Dictionary<string, List<double>>>(
    jsonStr,
    new JsonSerializerSettings 
    { 
        MetadataPropertyHandling = MetadataPropertyHandling.Ignore 
    });

This correctly deserializes into your target dictionary structure: