using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        List<string> input=new List<string>();

        input.Add("001-HA-Manager");

        input.Add("001-HA-Supervisor");

        input.Add("001-HA-Validation");

        input.Add("001-HA-DocumentReviewer");

        input.Add("001-HA-ManagerReviewer");

        input.Add("002-HA-Manager");

        input.Add("002-HA-Supervisor");

        input.Add("002-HA-Validation");

        List<Lookup> lookup= new List<Lookup>();

        foreach(var item in input)

        {

            Lookup lookupitem=new Lookup();

            var tokenizeditem=item.Split('-');

            lookupitem.ProjectCode=tokenizeditem[0];

            lookupitem.Title=tokenizeditem[2];

            lookup.Add(lookupitem); 

        }

        //Now group by:

        var test= from p in lookup

              group p.Title by p.ProjectCode into g

              select new Project { ProjectCode = g.Key, Groups = g.ToList() };

        var customDataObj = new { Project = test };

        var jstring= JsonConvert.SerializeObject(customDataObj);

        Console.WriteLine(jstring); 

    }

}

​

public class Project

{

    public string ProjectCode {get;set;}

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

}

​

public class Lookup

{

    public string ProjectCode {get;set;}

    public string Title {get;set;}

}