I did some research on some Saab forums.  I found that typically on US bound Saab 9-5 a bulb is installed on both sides.  However, the metal circuit on the passenger side is cut to disable that side.  This is to prevent the rear fog lights from appearing as brake lights (there are arguments about the legality of dual rear fog lights in certain US locations).

It appears the circuit can be soldered back together and to enable dual rear fog lights.  

Should only the left "Rear Fog Light" actually light up in a pair?
I am having the following in my .hbm.xml file

&lt;?xml version="1.0" encoding="utf-8" ?&gt;
&lt;hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
                                    namespace="Core.Domain.Model"
                                    assembly="Core"&gt;

  &lt;class name="Category" table="Categories" dynamic-update="true"&gt;
    &lt;cache usage="read-write"/&gt;
    &lt;id name="Id" column="Id" type="Guid"&gt;
      &lt;generator class="guid"/&gt;
    &lt;/id&gt;
    &lt;property name="Name" length="100"&gt;
    &lt;column name="Name" unique="true" index="IX_Category"/&gt;
    &lt;/property&gt;
  &lt;/class&gt;
&lt;/hibernate-mapping&gt;




I am having the following code, however, I can see that no exception is being raised when I am inserting a duplicate value for the Name field. Why is that so? 

 void IRepository&lt;Category&gt;.Save(Category entity)
        {
            using (var scope = new TransactionScope(TransactionScopeOption.Required))
            {
            using (ISession session = NHibernateHelper.OpenSession())
            {
                using (ITransaction transaction = session.BeginTransaction())
                {
                    session.Save(entity);
                    transaction.Commit();
                }
            }
            scope.Complete();
            }    
        }

