array to json | c#/unity3d

using UnityEngine;
using System.Collections.Generic;

public class Utils
{
    public static string arrayToJson<T>(IList<T> array, char separate)
    {
        string response = string.Empty;

        for (int i = 0; i < array.Count; i++)
        {
            response += JsonUtility.ToJson(array[i]);

            if (i != array.Count - 1)
                response += separate;
        }

        return response;
    }
}

// example: https://www.youtube.com/watch?v=new5vnMsbwI