title: Orders and Order Details
body: <p>I am Business Logic component to enable Customers can place online orders. So far my simplified business logic look like this:</p>
  
  <pre><code>  public class Product 
    {  
        public int productID { get; }  
        public string name { get; set; } 
        //other properties here like address and such
    } 
  
  
    public class Order
    {
       public int orderID { get; }
       public Customer customer { get; set; }
  
       public List&lt;Product&gt;  OrderItems  { get; set; }
       //other properties go here 
  
    }
  </code></pre>
  
  <p>List of <code>Products</code> will not support orders that contain products of multiple quantities. How do I add that support here? How would I call it from client side?</p>