public async Task<ActionResult> Messages()
{
    var collection = db.Messages;
    ViewBag.NotifierEntity = db.GetNotifierEntity<Message>(collection).ToJson();

    return View(await collection.ToListAsync());
}

public async Task<ActionResult> Messages()
{
    var username = CurrentUser().UserName;
    var collection = db.Messages.Where(m => m.Recipients
        .All(u => u.UserName == username));
    ViewBag.NotifierEntity = db.GetNotifierEntity<Message>(collection).ToJson();
    return View(await collection.ToListAsync());
}

public static NotifierEntity FromJson(string value)
{
    if (String.IsNullOrEmpty(value))
        throw new ArgumentNullException("NotifierEntity Value can not be null.");

    //return new JavaScriptSerializer().Deserialize<NotifierEntity>(value);
    return JsonConvert.DeserializeObject<NotifierEntity>(value, new JsonSerializerSettings {
        NullValueHandling = NullValueHandling.Ignore
    });
}

[Newtonsoft.Json.JsonSerializationException] {"Error converting value "p__linq__0" to type 'System.Data.SqlClient.SqlParameter'. Path 'SqlParameters[0]', line 1, position 1010."}

[InnerException] {"Could not cast or convert from System.String to System.Data.SqlClient.SqlParameter."}