Linq to SQL Partial Classes

While experimenting with Linq to SQL, I realized right away that I needed to extend the functionality of the entity classes generated by the Linq to SQL designer.  I wanted to be able to sort the entity classes by having them implement IComparable.

The solution turned out to be simple:  extend each entity class by defining a partial class, and implement IComparable in the partial class definition.  For example, I had an entity class Newspaper, which I extended with a partial class:

public partial class Newspaper : IComparable<Newspaper>
{
    #region IComparable<Newspaper> Members
    public int CompareTo(Newspaper other)
    {
        if (other == null)
            throw new ArgumentNullException("other");
        return Newspaper_Name.CompareTo(other.Newspaper_Name);
    }
    #endregion
}