I have a RelationCollection r that I want to use in a IRelationPredicateBucket b.

I cant':

b.relations = r;

(It's a read only property) I can't:

for( int i = 0; i<r.count;i++)
{
  b.r.add(r[i]);
}

(It loses the aliases and join hints. Is there a way to get them out so I can use and overload of add?)

Edit: I've found the SetAliases method on IEntityRelation but there doesn't seem to be corresponding GetStartAlias() and GetEndAlias().

I think I can use IsWeak to determine the JoinHint to use. So if I had the getStartAlias and GetEndAlias, I could use a Add override to do what I want.

and

b.relations.addrange(r);
or
b.relations.addrange((ICollection)r);

gives me errors (Something about ICollection<T>).

use b.relations.AddRange((RelationCollection)r);

You have to cast to RelationCollection, as IRelationCollection doesn't implement ICollection and the AddRange() accepts an ICollection.

Thanks. That worked.