public ExportCompletedViewModel(string title, FileInfo file)
{
Title = title;
File = file;
OpenFileCommand = ReactiveCommand.Create(this.WhenAnyValue(me => me.File).Select(f => f?.Exists == true));
OpenFolderCommand = ReactiveCommand.Create(this.WhenAnyValue(me => me.File).Select(f => f?.Directory?.Exists == true));
OpenFileCommand.Subscribe(_ => Process.Start(File.FullName));
OpenFolderCommand.Subscribe(_ => Process.Start(File.DirectoryName));
Result = CloseCommand.Select(_ => (bool?)true);
}