Given a DateTime object, how do I get an ISO 8601 date in string format?

Question

Given:

DateTime.UtcNow

How do I get a string which represents the same value in an ISO 8601-compliant format?

Note that ISO 8601 de

Answer 1

To format like 2018-06-22T13:04:16 which can be passed in the URI of an API use:

public static string FormatDateTime(DateTime dateTime)
{
    return dateTime.ToString("s", System.Globalization.CultureInfo.InvariantCulture);
}