using System;

using System.Text;

using System.Net.Http;

using System.Collections.Generic;

using Newtonsoft.Json;

​

public class Program

{

    public static void Main()

    {

        Dictionary<string, string[]> dict = new Dictionary<string, string[]>();

        dict.Add("RegEx1", new string[]{"val1","val2","val3"});

        dict.Add("RegEx2", new string[]{"val4","val5","val6"});

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

    }

}

​

public class RegExData

{

    public 

}