static void Main(string[] args)
{
var service = new ProductService(new ProductEFRepository());
Console.WriteLine(service.GenerateCode());
//var product = service.New();
var product = new Product { Id = 1, Code = "P01", Name = "Test" };
var product1 = new Product { Id = 1, Code = "P01", Name = "Test" };
Console.WriteLine(product == product1);
Console.WriteLine(product.Equals(product1));
Console.WriteLine(product.GetHashCode());
Console.WriteLine(product1.GetHashCode());
}