using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json;

​

public class Program

{

    public static void Main()

    {

        var results = new List<UserApplications>()

        {new UserApplications()

        {AppFormName = "TFB Test Application", QuestionName = "How old are you?", QuestionType = 1}, new UserApplications()

        {AppFormName = "TFB Test Application", QuestionName = "Where are you from?", QuestionType = 1}, new UserApplications()

        {AppFormName = "HLL", QuestionName = "How old are you?", QuestionType = 1}, new UserApplications()

        {AppFormName = "HLL", QuestionName = "Where are you from?", QuestionType = 1}, new UserApplications()

        {AppFormName = "HLL", QuestionName = "What Game are you applying for?", QuestionType = 2}, new UserApplications()

        {AppFormName = "HLL", QuestionName = "Do you agree to the clan rules", QuestionType = 3}};

        var appFormList = results.GroupBy(s => s.AppFormName).Select(g => new

        {

          AppFormName = g.Key, Questions = g.Select(a => new

          {

            a.QuestionName, a.QuestionType

          })

        });

        Console.WriteLine(JsonConvert.SerializeObject(appFormList));

    }

}

​

public class UserApplications

{

    public string AppFormName

    {

        get;

        set;

    }

​

    public string QuestionName

    {

        get;

        set;

    }

​

    public int QuestionType

    {

        get;

        set;

    }

}