mRemoteNG.Tree.ConnectionTreeModel.AddRootNode C# (CSharp) Method

        public void AddRootNode(ContainerInfo rootNode)
        {
            if (RootNodes.Contains(rootNode)) return;
            RootNodes.Add(rootNode);
            rootNode.CollectionChanged += RaiseCollectionChangedEvent;
            rootNode.PropertyChanged += RaisePropertyChangedEvent;
            RaiseCollectionChangedEvent(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, rootNode));
        }

 private ConnectionTreeModel SetupConnectionTreeModel()
 {
     /*
      * Root
      * |--- con0
      * |--- folder1
      * |    L--- con1
      * L--- folder2
      *      |--- con2
      *      L--- folder3
      *           |--- con3
      *           L--- con4
      */
     var connectionTreeModel = new ConnectionTreeModel();
     var rootNode = new RootNodeInfo(RootNodeType.Connection);
     var folder1 = new ContainerInfo { Name = "folder1" };
     var folder2 = new ContainerInfo { Name = "folder2" };
     var folder3 = new ContainerInfo { Name = "folder3" };
     var con0 = new ConnectionInfo { Name = "con0" };
     var con1 = new ConnectionInfo { Name = "con1" };
     var con2 = new ConnectionInfo { Name = "con2" };
     var con3 = new ConnectionInfo { Name = "con3" };
     var con4 = new ConnectionInfo { Name = "con4" };
     rootNode.AddChild(folder1);
     rootNode.AddChild(folder2);
     rootNode.AddChild(con0);
     folder1.AddChild(con1);
     folder2.AddChild(con2);
     folder2.AddChild(folder3);
     folder3.AddChild(con3);
     folder3.AddChild(con4);
     connectionTreeModel.AddRootNode(rootNode);
     return connectionTreeModel;
 }