date format yyyy-MM-ddTHH:mm:ssZ

Question

I assume this should be pretty simple, but could not get it :(. In this format Z is time zone.
T is long time pattern
How could I get a date in this format excep

Answer 1

"o" format is different for DateTime vs DateTimeOffset :(

DateTime.UtcNow.ToString("o") -> "2016-03-09T03:30:25.1263499Z"

DateTimeOffset.UtcNow.ToString("o") -> "2016-03-09T03:30:46.7775027+00:00"

My final answer is

DateTimeOffset.UtcDateTime.ToString("o")   //for DateTimeOffset type
DateTime.UtcNow.ToString("o")              //for DateTime type