using System;

using System.IO;

using System.Text;

using System.Linq;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using System.Linq.Dynamic.Core;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var resultString = String.Empty;

        String json = "[{\"Name\": \"Mr. Test Smith\",\"Type\": \"ACCOUNTSPAYABLE\",\"Something\": {\"Field1\": \"Test1\",\"Field2\": \"Test2\"}},{\"Name\": \"Mr. Test Smith\",\"Type\": \"DISPATCH\",\"Something\": {\"Field1\": \"Test1\",\"Field2\": \"Test2\"}},{\"Name\": \"Different Name\",\"Type\": \"ACCOUNTSPAYABLE\",\"Something\": {\"Field1\": \"Test3\",\"Field2\": \"Test4\"}}]";

        var data = JsonConvert.DeserializeObject<List<JObject>>(json);      

        var groups = DynamicQueryableExtensions.GroupBy(data.AsQueryable(), "new (Name, Type)");

        var stringBuilder = new StringBuilder();

        var stringWriter = new StringWriter(stringBuilder);

​

        // Write out all of the results to a JSON array with the embedded objects.

        using (var jsonWriter = new JsonTextWriter(stringWriter))

        {

            jsonWriter.WriteStartArray();

​

            foreach (var group in groups.ToDynamicList())

            {

                jsonWriter.WriteStartObject();

​

                jsonWriter.WritePropertyName("Key");

                jsonWriter.WriteRawValue(JsonConvert.SerializeObject(group.Key));

​

                jsonWriter.WritePropertyName("Values");

                jsonWriter.WriteRawValue(JsonConvert.SerializeObject(group));

​

                jsonWriter.WriteEndObject();

            }

​

            jsonWriter.WriteEndArray();

            jsonWriter.Close();

​

            resultString = stringWriter.ToString();

        }

​

        var result = JsonConvert.SerializeObject(JsonConvert.DeserializeObject<List<JObject>>(resultString), Newtonsoft.Json.Formatting.Indented);

        Console.WriteLine(result);

    }

}