Is bug #1449 fixed?

Hi,

I have encountered Bug #1449 of https://github.com/aspnet/EntityFramework/issues/1449.  According to the post,  rowanmiller closed this Dec 8, 2015. However, I am still having this problem now. I am using Asp.Net Core 1.0. If someone has closed it, am I missing something or what?

Here is my situation: my Product class includes a list of Pictures (which is represented as image paths) within it

    public class Product
    {
        [Key]
        public int ProductId { get; set; }
        public string ProductName { get; set; }
        .....
        public List<FilePath> ImagePaths { get; set; } = new List<FilePath>(); 
    }



    public class FilePath
    {
        [Key]
        public int FilePathId { get; set; }
        public int ProductId { get; set; }//foreign key
        public virtual Product product { get; set; }//reference navigation property
        public string Path { get; set; }
    }

when I add an ImagePaths to my Product, it's fine for the first time. However, when I add another ImagePaths, the first one get lost; when I add a 3rd one, the second one get lost; ... In short, the Product.List<FilePath> can keep only ONE copy. Here is my code:

             Product currentProduct = ProductRepository.SelectByID(ProductId);
             FilePath fp = new FilePath { ProductId = ProductId, product = currentProduct, Path = FullFileName };
             currentProduct.ImagePaths.Add(fp);
             ProductRepository.Update(currentProduct);

and I do have SaveChanges within my ProductRepository.Update() function:

  public class ProductRepository : IProductRepository
  {
       private ApplicationDbContext _context = null;

       public ProductRepository(ApplicationDbContext db)
       {
            _context = db;
       }


        public void Update(Product product)
        {
            Product prodt = _context.Products.SingleOrDefault(c => c.ProductId == product.ProductId);
            if(prodt != null)
            {
                prodt.AdditionalShippingCharge = product.AdditionalShippingCharge;
                prodt.AdministratorNote = product.AdministratorNote;
                prodt.CategoryId = product.CategoryId;
                .......
                _context.Entry(prodt).State = EntityState.Modified;
                _context.SaveChanges();
             }
         }
    }

I am using SQL Server