日期时间设置 "2018-05-04T16:36:23.6341371+08:00" 格式

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Text;

namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{

string ISO8601time = DateTime.Now.ToString("yyyy-MM-ddTHH:mm:sszzzz", DateTimeFormatInfo.InvariantInfo);
string ISO8601time1 = DateTime.UtcNow.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ssZ");
string ISO8601time2 = DateTime.Now.ToString("yyyy-MM-ddTHH:mm:ss.fffffffzzzz", DateTimeFormatInfo.InvariantInfo);
string ISO8601time3 = DateTime.UtcNow.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ss.fffffffZ");
Console.WriteLine(ISO8601time);
Console.WriteLine(ISO8601time1);
Console.WriteLine(ISO8601time2);
Console.WriteLine(ISO8601time3);
Console.Read();
}
}
}

结果：