Json to csv json.net C# deserialization problem

See more:

C#

.NET

Convert Json to CSV
I am using json .net library
I have big json file and need to convert to .csv file I can able to deserialized array to datatable and

datatable to csv.
how to deserialized whole file to csv ? it has list,array some rootobjects

I have generated classes from json file using "json2csharp"

json file structure;

{
    "Active":"0",
    "Customer_Reference":"Suncor",
    "Datalink_Bus":"J1939",
    "Engine_Serial_Number":"66302847",
    "Equipment_ID":"0300",
    "FMI":"1",
    "Latitude":"56.727",
    "Longitude":"-111.381",
    "Message_Type":"FC",
    "Notification_Version":"2.004.002",
    "Occurrence_Count":"1",
    "Occurrence_Date_Time":"2016-10-11T14:34:38.150Z",
    "SPN":"100",
    "Sent_Date_Time":"2016-10-12T00:52:28.825Z",
    "Snapshots":
    [{ 
         "Parameter":
         [{
              "Name":"Truck speed",
              "Parameter_Source_Address":"",
              "Value":"0"
          },
          { 
              "Name":"HP Feedback - Alt In", 
              "Parameter_Source_Address":"", 
              "Value":"7"
          }],
          "Snapshot_DateTimestamp":"2016-10-11T14:34:09.000Z"
     }, 
     {
         "Parameter":
         [{
              "Name":"Truck speed",
              "Parameter_Source_Address":"",
              "Value":"0"
          },
          {
              "Name":"HP Feedback - Alt In",
              "Parameter_Source_Address":"",
              "Value":"7"
          }],
         "Snapshot_DateTimestamp":"2016-10-11T14:34:10.000Z"
     }]
}

Classes:

 public class Parameter
    {
        public string Name { get; set; }

        public string Parameter_Source_Address { get; set; }

        public string Value { get; set; }

    }
 
public class Snapshot
    {
        public List<parameter> Parameter { get; set; }

        public string Snapshot_DateTimestamp { get; set; }

    }
public class RootObject
    {
        public string Active { get; set; }

        public string Customer_Reference { get; set; }

        public string Datalink_Bus { get; set; }

        public string Engine_Serial_Number { get; set; }

        public string Equipment_ID { get; set; }

        public List<snapshot> Snapshots { get; set; }
}

I am am getting only columns in datagrid view and empty rows.(null)

how do i parse multilayer Json TO CSV

What I have tried:

public string ReadJsonFile(String Filepath)
{
    string json = string.Empty;
    // char seperator = ',';

    using (StreamReader read = new StreamReader(textBox1.Text))
    {
        json = read.ReadToEnd();

	var data1 = JsonConvert.DeserializeObject<parameter>(json);

        List<parameter> data = JsonConvert.DeserializeObject<list<parameter>>(json);

        DataTable dTable = ToDataTable(data)  ;//call function to convert list to datatable

        dataGridView1.DataSource = dTable;
    }
    return json;
}

With this I am getting 3 columns (Name,Parameter Address, Value)in datatable but they are empty ..no row data.