public UsnJrnlPreviewer(Stream stream)
 {
     this._stream = stream ?? throw new ArgumentNullException(nameof(stream));
     _vm          = new UsnJrnlPreviewerViewModel(stream);
     UIObject     = ViewProvider.CreateView(Constants.UsnJrnlPreviewerView, _vm);
 }
 public void Initialize()
 {
     _vm = new UsnJrnlPreviewerViewModel(File.OpenRead(UsnFileName));
     Assert.IsNotNull(_vm.Stream);
 }