Console.WriteLine($"-b "{DateTime.Now.AddHours(-2):M/d/yyyy hh:mm:ss}"");

-b "6/19/2018 07:45:44"

-b "6-19-2018 07:20:17"

Console.WriteLine($"-b "{DateTime.Now.AddHours(-2):M`/`d`/`yyyy hh`:`mm`:`ss}"");

onsole.WriteLine(DateTime.Now.ToString("M/d/yyyy hh:mm:ss",
                                          CultureInfo.InvariantCulture));