public GoToDefinitionFilterProvider( [Import(typeof(SVsServiceProvider))] System.IServiceProvider serviceProvider, IVsEditorAdaptersFactoryService editorFactory, IEditorOptionsFactoryService editorOptionsFactory, ITextDocumentFactoryService textDocumentFactoryService, [Import(typeof(DotNetReferenceSourceProvider))] ReferenceSourceProvider referenceSourceProvider, VSLanguageService fsharpVsLanguageService, ProjectFactory projectFactory) { _serviceProvider = serviceProvider; _editorFactory = editorFactory; _editorOptionsFactory = editorOptionsFactory; _textDocumentFactoryService = textDocumentFactoryService; _referenceSourceProvider = referenceSourceProvider; _fsharpVsLanguageService = fsharpVsLanguageService; _projectFactory = projectFactory; var dte = serviceProvider.GetService(typeof(SDTE)) as DTE; var events = dte.Events as Events2; if (events != null) { _solutionEvents = events.SolutionEvents; _solutionEvents.AfterClosing += Cleanup; } }