public MainViewModel(IFileDialogService fds, IHelixView3D hv) { Expansion = 1; FileDialogService = fds; HelixView = hv; FileOpenCommand = new DelegateCommand(FileOpen); FileExportCommand = new DelegateCommand(FileExport); FileExitCommand = new DelegateCommand(FileExit); ViewZoomToFitCommand = new DelegateCommand(ViewZoomToFit); EditCopyXamlCommand = new DelegateCommand(CopyXaml); ApplicationTitle = "3D Model viewer"; }