in AdventureWorksMVC/Business/ProductManager.cs [98:107]
public static List<decimal?> GetProductWeight(int categoryId)
{
List<decimal?> weightList = null;
weightList = (from p in Common.DataEntities.Product
where p.ProductSubcategory.ProductSubcategoryID == categoryId
&& p.Weight != null
orderby p.Weight
select p.Weight).Distinct().ToList();
return weightList;
}