public RegisteredPackageSourcesViewModel( IPackageSourceProvider packageSourceProvider, IFolderBrowser folderBrowser, PackageSourceViewModelChecker packageSourceChecker) { this.packageSourceProvider = packageSourceProvider; this.folderBrowser = folderBrowser; this.packageSourceChecker = packageSourceChecker; if (packageSourceChecker != null) { packageSourceChecker.PackageSourceChecked += PackageSourceChecked; } CreateCommands(); }