Add Index method to the Controller

gistfile1.cs

public ActionResult Index()
{
     var model = new DeveloperModel();
     var developers_collection = mongo_db.GetCollection("developers").FindAll().AsEnumerable();

     model.developers = (from developer in developers_collection
                         select new DeveloperDTO
                                    {
                                        id = developer["_id"].AsObjectId,
                                        name = developer["name"].AsString,
                                        languages = developer["languages"].AsBsonArray.ToString(),
                                        company = developer["company"].AsString
                                    }).ToList();

     return View(model);
}