public ChatViewManager(Notebook notebook, ChatTreeView treeView) { f_Notebook = notebook; TreeView = treeView; TreeView.Selection.Changed += OnTreeViewSelectionChanged; SyncManager = new ChatViewSyncManager(); SyncManager.ChatAdded += OnChatAdded; SyncManager.ChatSynced += OnChatSynced; SyncManager.WorkerException += OnWorkerException; }