How to make json format in ASP.NET Web API 2 to become vertical

Question

I have created an ASP.NET Web API 2 and I tried to show data in json format, it shows in horizontal way and it look like this in google chrome. I want to make it in the expect format.

Below error is what I get in the Google chrome:

This XML file does not appear to have any style information associated with it. The document tree is shown below. [{"UserId":23,"Name":"Emily","Access":3,"Mobile":"07419231"},{"UserId":31,"Name":"Lydia","Access":5,"Mobile":"67567587"},{"UserId":45,"Name":"Peter","Access":1,"Mobile":"90345853"},{"UserId":56,"Name":"Lebron","Access":4,"Mobile":"43895449"},{"UserId":73,"Name":"Amber","Access":0,"Mobile":"45788477"}]

What I expect is something like this format in below:

[
    {
        "UserId":23,
        "Name":"Emily",
        "Access":3,
        "Mobile":"07419231"
    },
    {
        "UserId":31,
        "Name":"Lydia",
        "Access":5,
        "Mobile":"67567587"
    },
    {
        "UserId":45,
        "Name":"Peter",
        "Access":1,
        "Mobile":"90345853"
    },
    {
        "UserId":56,
        "Name":"Lebron",
        "Access":4,
        "Mobile":"43895449"
    },
    {
        "UserId":73,
        "Name":"Amber",
        "Access":0,
        "Mobile":
        "45788477"
    }
]

Here is my code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using System.Data;
using System.Data.SqlClient;
using Newtonsoft.Json;

namespace ApiTesting.Controllers
{
    public class TestController : ApiController
    {
        SqlConnection con = new SqlConnection(@"server=DESKTOP-US2AF5N; database=Test; integrated security=true;");

        public string Get()
        {
            SqlDataAdapter da = new SqlDataAdapter("Select * From TblDraft", con);
            DataTable dt = new DataTable();
            da.Fill(dt);

            if (dt.Rows.Count > 0)
            {
                return JsonConvert.SerializeObject(dt);
            }
            else
            {
                return "No Data Found";
            }
        }
    }
}

Answer 1

When you serialize an c# object using Newtonsoft.Json you have to add a formatting option if you want to get an intented string

 return JsonConvert.SerializeObject(dt,Newtonsoft.Json.Formatting.Indented);