[nhusers] Session.Merge

I am not getting the expected behaviour from Session.Merge and
wondered if I am doing something wrong.

I have an object such as

public class SomeObject
{
 public virtual int id { get;set;}
 public virtual string name { get;set;}
 public virtual DateTime Added { get; set;} // not null
}

I then want to create a new object, with an ID. The object might exist
in the database with the same ID, and if this is the case I would like
to merge the new object with the one in the database and then save it.

I had something like this

var someObject = new SomeObject
{
 id = 1,
 name = "test"
};
var newSomeObject = session.Merge(someObject);
session.Flush();

When I run it, I can see from NHProf, that the object does exist in
the database and its being selected but it is never merged. All I get
back in newSomeObject is my original new object. When I flush or
commit, I then get an error because Added is null because the objects
haven't been merged.

Any ideas what I might be doing wrong?

Andrew

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