How to resolve this problem cannot constructed in LING

Question

Error: System.NotSupportedException: 'The entity or complex type 'ECommercedbModel.ProductDetail' cannot be constructed in a LINQ to Entities query.'

 

 

public ProductViewModel GetProductByID(int ID)
        {
            ProductViewModel listprod = new ProductViewModel();

            try
            {
                var productsl = (from p in _db.Products
                                 where p.ProductID == ID

                                 select new Product
                                 {
                                     PName= p.PName,
                                     PDescription= p.PDescription,
                                     Model= p.Model,
                                     Condition= p.Condition,
                                     UnitPrice=p.UnitPrice,
                                     ManificturedPrice=p.ManificturedPrice,
                                     Discount=p.Discount,
                                     UnitWeight=p.UnitWeight,
                                     UnitInStock=p.UnitInStock
                                 }).FirstOrDefault();

                var productD = (from pd in _db.ProductDetails
                                join b in _db.Products on pd.ProductID equals b.ProductID
                                where pd.ProductID == ID
                                select new ProductDetail
                                {
                                    ProductID =pd.ProductID,
                                    OS=pd.OS,
                                    ProcessorType=pd.ProcessorType,
                                    RAM=pd.RAM,
                                    ScreenSize=pd.ScreenSize,
                                    TouchScreen=pd.TouchScreen,
                                    BatteryLife=pd.BatteryLife,
                                    Camera=pd.Camera
                                }).ToList();

                return new ProductViewModel { listProducts = productsl, listProductDetails = productD };
            }

            catch (Exception)
            {

                throw;
            }
        }