Given:
DateTime.UtcNow
How do I get a string which represents the same value in an ISO 8601-compliant format?
Note that ISO 8601 defines a number of similar formats. The specific format I am looking for is:
yyyy-MM-ddTHH:mm:ssZ
Note to readers: Several commenters have pointed out some problems in this answer (related particularly to the first suggestion). Refer to the comments section for more information.
DateTime.UtcNow.ToString("yyyy-MM-ddTHH\\:mm\\:ss.fffffffzzz");
This gives you a date similar to 2008-09-22T13:57:31.2311892-04:00.
Another way is:
DateTime.UtcNow.ToString("o");
which gives you 2008-09-22T14:01:54.9571247Z
To get the specified format, you can use:
DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssZ")