Universe.Region.SceneObjectGroup.AddChild C# (CSharp) Method

        public bool AddChild(ISceneChildEntity child, int linkNum)
        {
            lock (m_partsLock)
            {
                if (child is SceneObjectPart)
                {
                    SceneObjectPart part = (SceneObjectPart) child;
                    //Root part is first
                    if (m_partsList.Count == 0)
                    {
                        m_rootPart = part;
                    }
                    //Set the parent prim
                    part.SetParent(this);
                    if (m_rootPart.LocalId != 0 && !part.IsRoot)
                        part.SetParentLocalId(m_rootPart.LocalId);
                    else
                        part.SetParentLocalId(0);

                    //Fix the link num
                    part.LinkNum = linkNum;

                    if (!m_parts.ContainsKey(child.UUID))
                    {
                        m_parts.Add(child.UUID, part);
                        m_partsList.Add(part);
                        m_ValidgrpOOB = false;
                    }
                    return true;
                }
            }
            return false;
        }

        public RegionData LoadBackup(string file)
        {
            if (!File.Exists(file))
                return null;
            try
            {
                FileStream stream = File.OpenRead(file);
                RegionData regiondata = ProtoBuf.Serializer.Deserialize<RegionData>(stream);
                stream.Close();

                List<SceneObjectGroup> grps = new List<SceneObjectGroup>();

                if (regiondata.Groups != null)
                {
                    foreach (SceneObjectGroup grp in regiondata.Groups)
                    {
                        SceneObjectGroup sceneObject = new SceneObjectGroup(grp.ChildrenList[0], null);
                        foreach (SceneObjectPart part in grp.ChildrenList)
                        {
                            if (part.UUID == sceneObject.UUID)
                                continue;
                            sceneObject.AddChild(part, part.LinkNum);

                            part.StoreUndoState();
                        }
                        grps.Add(sceneObject);
                    }
                    regiondata.Groups = grps;
                }
                else
                    regiondata.Groups = new List<SceneObjectGroup>();
                return regiondata;
            }
            catch (Exception ex)
            {
                MainConsole.Instance.Warn("[ProtobufRegionLoader]: Failed to load backup: " + ex.ToString());
                return null;
            }
        }