Dynamo.Controls.DynamoView.WindowClosed C# (CSharp) Method

        private void WindowClosed(object sender, EventArgs e)
        {
            //There will be chances that WindowsClosed is called but WindowClosing is not called.
            //This is to ensure PerformShutdownSequence is always called on the view model.
            if (!isPSSCalledOnViewModelNoCancel)
            {
                PerformShutdownSequenceOnViewModel();
            }

            dynamoViewModel.Model.RequestLayoutUpdate -= vm_RequestLayoutUpdate;
            dynamoViewModel.RequestViewOperation -= DynamoViewModelRequestViewOperation;

            //PACKAGE MANAGER
            dynamoViewModel.RequestPackagePublishDialog -= DynamoViewModelRequestRequestPackageManagerPublish;
            dynamoViewModel.RequestManagePackagesDialog -= DynamoViewModelRequestShowInstalledPackages;
            dynamoViewModel.RequestPackageManagerSearchDialog -= DynamoViewModelRequestShowPackageManagerSearch;
            dynamoViewModel.RequestPackagePathsDialog -= DynamoViewModelRequestPackagePaths;

            //FUNCTION NAME PROMPT
            dynamoViewModel.Model.RequestsFunctionNamePrompt -= DynamoViewModelRequestsFunctionNamePrompt;

            //Preset Name Prompt
            dynamoViewModel.Model.RequestPresetsNamePrompt -= DynamoViewModelRequestPresetNamePrompt;
            dynamoViewModel.RequestPresetsWarningPrompt -= DynamoViewModelRequestPresetWarningPrompt;

            dynamoViewModel.RequestClose -= DynamoViewModelRequestClose;
            dynamoViewModel.RequestSaveImage -= DynamoViewModelRequestSaveImage;
            dynamoViewModel.SidebarClosed -= DynamoViewModelSidebarClosed;

            DynamoSelection.Instance.Selection.CollectionChanged -= Selection_CollectionChanged;

            dynamoViewModel.RequestUserSaveWorkflow -= DynamoViewModelRequestUserSaveWorkflow;

            if (dynamoViewModel.Model != null)
            {
                dynamoViewModel.Model.RequestsCrashPrompt -= Controller_RequestsCrashPrompt;
                dynamoViewModel.Model.RequestTaskDialog -= Controller_RequestTaskDialog;
                dynamoViewModel.Model.ClipBoard.CollectionChanged -= ClipBoard_CollectionChanged;
            }

            //ABOUT WINDOW
            dynamoViewModel.RequestAboutWindow -= DynamoViewModelRequestAboutWindow;

            //SHOW or HIDE GALLERY
            dynamoViewModel.RequestShowHideGallery -= DynamoViewModelRequestShowHideGallery;

            foreach (var ext in viewExtensionManager.ViewExtensions)
            {
                try
                {
                    ext.Shutdown();
                }
                catch (Exception exc)
                {
                    Log(ext.Name + ": " + exc.Message);
                }
            }

            viewExtensionManager.MessageLogged -= Log;
        }