DBSet<MyClass> Table1 {get;set;} 

        
public IQueryable<ProductSet> ProductSetWithUser()
        {
            IQueryable<ProductSet> productSet =
                (from ps in this.ProductSet join p in this.Product on ps.ProductId equals p.Id select ps).Select(
                    item => new ProductSet
                    {
                        Id = item.Id,
                        ProductCount = item.ProductCount,
                        ProductId = item.ProductId,
                        ProductPartId = item.ProductPartId,
                        UserId = item.UserId
                    });

            return productSet;
        }

                
public IQueryable<ProductSet> ProductSetWithUser
        {
            get
            {
                IQueryable<ProductSet> productSet = from ps in ProductSet join p in Product on ps.ProductId equals p.Id select ps;

                IQueryable<ProductSet> list = productSet.AsEnumerable().Select(psp => new ProductSet
                {
                    Id = psp.Id,
                    ProductCount = psp.ProductCount,
                    ProductId = psp.ProductId,
                    ProductPartId = psp.ProductPartId,
                    UserId = psp.UserId
                }).AsQueryable();

                return list;
            }
        }

        
public override IQueryable<ProductSet> Get()
        {
            IQueryable<ProductSet> productSets = _db.ProductSetWithUser.AsEnumerable().Select(item => new ProductSet
            {
                Id = item.Id,
                ProductCount = item.ProductCount,
                ProductId = item.ProductId,
                ProductPartId = item.ProductPartId,
                UserId = item.Product.UserId,
                Product = item.Product,
                ProductPart = item.ProductPart
            }).AsQueryable();

            return productSets;
        }