JsonFormatter ReferenceLoopHandling

I've been struggling with this for a few days, and no solutions I've found so far have made me happy.

The project was created using WebAPI 2 and Entity Framework 6. The parameters for my WebApiConfig have been modified to

        config.Formatters.Remove(GlobalConfiguration.Configuration.Formatters.XmlFormatter);
        config.Formatters.JsonFormatter.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;

An apparent infinite loop and a System Out Of Memory Exception are currently present.

I can't seem to figure out how to accomplish this properly.

I also attempted this via the WebAPI Method, and the problem persisted.

    public async Task<IHttpActionResult> GetCustomer_Title(int id)
    {
        Customer_Title c = await db.Customer_Title.FindAsync(id);
        if (c == null)
        {
            return NotFound();
        }

        var json = JsonConvert.SerializeObject(c, new JsonSerializerSettings()
        {
            ReferenceLoopHandling = ReferenceLoopHandling.Ignore
        });


        return Ok(json);
    }

furthermore, in my Customer Title Class

 public partial class Customer_Title
    {

        public Customer_Title()
        {
            Customer = new HashSet<Customer>();
        }

        [Key]
        public int TitleID { get; set; }

        [Required]
        [StringLength(100)]
        public string TitleDescription { get; set; }

        public int InstanceID { get; set; }

        [JsonIgnore]
        public virtual ICollection<Customer> Customer { get; set; }

        public virtual System_Instance System_Instance { get; set; }
    }

It appears that the [JsonIgnore] Attribute is doing nothing.