Read value from nested Json object

I am trying to read a value from a nested Json object, but I am getting a Parse error:

My Json object:

{
    "MessageId": "f6774927-37cf-4608-b985-14a7d86a38f9",
    "Time": "2017-04-06T16:28:38.0719933+02:00",
    
    "Data":
    {
        "ID":
        {
            "value": "0008044834"
        },
        "Carrier":
        {
            "value": 0
        },
        "Tool":
        {
            "value": 0
        }
    }
}

          var myJsonString = File.ReadAllText(_currentDictory.FullName + @"\test\" + completeFilename);


            var myJObject = JObject.Parse(myJsonString);


            var serial = myJObject.SelectToken("Data.ID").Value<String>();

System.InvalidCastException
  HResult=0x80004002
  Message=Cannot cast Newtonsoft.Json.Linq.JObject to Newtonsoft.Json.Linq.JToken.
  Source=Newtonsoft.Json

Reading other values such as "MessageID" works withou any problems, but as soon as I try to get "Data.XYZ" I am getting the error above.

You need to add value to your json path:

var serial = myJObject.SelectToken("Data.ID.value").Value<String>();

Your current path selects JObject containing one property named value and you can't convert it directly to string.