using System;

using System.Collections.Generic;

using Newtonsoft.Json;

​

public class Program

{

    public static void Main()

    {

        var result = @"{

    ""x"": {

        ""name"": ""COLUMN2"",

        ""type"": ""java.lang.String""

    },

    ""report_row"": [{

        ""c1"": ""2019"",

        ""c2"": ""TEST123"",

        ""c3"": ""TEST123""

    }, {

        ""c1"": ""2019"",

        ""c2"": ""TEST345""

    }, {

        ""c1"": ""2020"",

        ""c2"": ""TEST567""

    }],

    ""message"": [""OK""],

    ""status"": 200

}";

        var example = JsonConvert.DeserializeObject<RootObject>(result);

        var report_row = example.report_row;

        foreach (var reportRow in report_row)

            foreach (var row in reportRow)

                Console.WriteLine(row.Key + ", " + row.Value);

    }

public class X

{

    public string name { get; set; }

    public string type { get; set; }

}

​

public class RootObject

{

    public X x { get; set; }

    public List<Dictionary<string, string>> report_row { get; set; }

    public List<string> message { get; set; }

    public int status { get; set; }

}

}