public class BaseObject
{
public virtual Guid Id { get; set; }
public virtual string Name { get; set; }
public virtual Container Container { get; set; }
}

public class Object1 : BaseObject
{
public virtual string Prop1 { get; set; }
}

public class Object2 : BaseObject
{
public virtual string Prop2 { get; set; }
}

public class Container
{
public Container() { Objects = new List<BaseObject>(); }
public virtual List<BaseObject> Objects { get; set; }
}

Container container = new Container();
container.Objects.Add(new Object1());
container.Objects.Add(new Object2());

Is that possible to save such object model with hibernate?
I tried all three: subclass, joined-subclass, union-subclass to save Object1 and Object2. Nothing works.

Can anybody point me where to read how to save List of polymorphic objects?

Thank You.

All three strategies should work here, that's basic functionality. You must have done something wrong. Can you post one of your approaches (mapping + code where you save/update) ?

And that's possibly a typo ?

public Container() { Container = new List<BaseObject>(); }

I had three levels of inheritance and NHibernate fails to understand it. Simplified it and it is working now.
Thanks. You gave me a punch to find solution. Even though not perfect enough.
I'll try to find time to post here in order to make it the way I want.