NHibernate Projections - how to project collections?

[Chuck Boyde]

Have a scenario where I need to only select a few properties from an
entity, but also collections. This seems such a normal situation, yet
cannot find info on projecting collections - only properties.

Customer customerAlias = null;
Order orderAlias = null;
var list = _session.QueryOver<Customer>(() => customerAlias)
.JoinAlias(x => x.Orders, () => orderAlias,
JoinType.LeftOuterJoin)
.Select(
Projections.Property(() => customerAlias.Name),
Projections.Property(() =>
customerAlias.Orders))//this is the issue
.List<object>();

Error returned is:

System.IndexOutOfRangeException : Index was outside the bounds of the
array