private void EditRelationSet() { if (listViewRelationSets.SelectedItems.Count == 1) { RelationSet relationSet = (RelationSet)listViewRelationSets.SelectedItems[0].Tag; RelationSet relationSetClone = relationSet.Clone(); if (_worker.OpenDatabaseRelationSet(relationSetClone)) { relationSet.Adopt(relationSetClone); UpdateRelationSetListView(relationSet); _worker.SaveRegistryRelationSets(); } } }