title: How do I index foreign keys using Fluent NHibernate and SchemaUpdate.Execute()?
body: <p>Is there a way in Fluent NHibernate to specify that a foreign key should be indexed? </p>
  
  <p>MS Sql Server's default configuration does not index foreign keys.  I would like the schema generated by the NHibernate schema generation/update tools to index these keys. When I just use the <code>HasMany</code> or <code>HasManyToMany</code> methods, no such indexes are created. Is this even possible with raw XML mappings?</p>