NHIbernate: Difference between Restriction.In and Restriction.InG

Question

When creating a criteria in NHibernate I can use

Restriction.In() or
Restriction.InG()

What is the difference between them?

Answer 1

Restriction.In definately creates a subquery with whatever criteria you pass to the .In() method, but not sure what InG() does. never seen it.

Answer 2

@Sean: I only saw InG today because of intellisense. I can't find anything about it in the docs. I'm using NHibernate 2.0

Answer 3

InG is the generic equivalent of In (for collections)

The signatures of the methods are as follows (only the ICollection In overload is shown):

In(string propertyName, ICollection values)

vs.

InG<T>(string propertyName, ICollection<T> values)

Looking at NHibernate's source code (trunk) it seems that they both copy the collection to an object array and use that going forward, so I don't think there is a performance difference between them.

I personally just use the In one most of the time - its easier to read.