datetime conversion to specific format

Question

i am finding a challenge to convert to this date format "2021-05-05T21:03:09+00:00". I have tried the following and it is not working:
DateTime now = DateTime.Now;

Console.WriteLine(now.ToString("o"));
it produces the following:
2021-04-03T22:49:56.2248862+00:00

Answer 1

DateTime localDate = DateTime.Now;
string Current_Date_Time;
Current_Date_Time = localDate.ToString("yyyy-MM-ddTHH:mm:ss+00:00");

Maybe this will work.

Answer 2

I like Igor's above.

Console.WriteLine($"{DateTime.Now:yyyy-MM-ddTHH:mm:ss+00:00}");

Answer 3

See if helps and with that explore various methods available.

string dateToConvert = "2021-05-05T21:03:09+00:00";

if (DateTimeOffset.TryParse(dateToConvert, out var result))
{
    Console.WriteLine($"{result}");
    Console.WriteLine($"{result} {result:O} - {result.ToLocalTime()}");
    Console.WriteLine($"{result.ToLocalTime()}");
}
else
{
    Console.WriteLine("Invalid");
}

See also NodaTime