web delvelopment + static

Hi we have following desgin

 

 public class Product{

  public static int AddProduct(agruments....){}

  public static int UpdateProduct(agruments....){} 

}

 

caller from aspx.cs

 

Product.AddProduct()

 

Question is if above design is advisable in webdevelopment. I learnt static usage is not incourage in web design please advice. ( Provide ref too).