using System;

using System.Globalization;

​

public class Program

{

    private static readonly string[] _acceptableFormats = new[]{"yyyy-MM-dd'T'HH:mm:ss.FFFFFFFK", "yyyy-MM-dd' 'HH:mm:ss.FFFFFFFK", "yyyy-MM-dd'T'HH:mm:ssK", "yyyy-MM-dd' 'HH:mm:ssK", "yyyy-MM-dd'T'HH:mm:ss", "yyyy-MM-dd' 'HH:mm:ss", "yyyy-MM-dd'T'HH:mm", "yyyy-MM-dd' 'HH:mm", "yyyy-MM-dd'T'HH", "yyyy-MM-dd' 'HH", "yyyy-MM-dd", "yyyy-MM-dd", "yyyyMMdd", "yyyy-MM", "yyyy"};

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var canParseValue = DateTimeOffset.TryParseExact("0001-01-01T00:00:00", _acceptableFormats, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTimeOffset dateTimeResult);

        Console.WriteLine(canParseValue);

        var canParseValue2 = DateTimeOffset.TryParseExact("0001-01-01T01:00:00", _acceptableFormats, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTimeOffset dateTimeResult2);

        Console.WriteLine(canParseValue2);

        var canParseValue3 = DateTimeOffset.TryParseExact(DateTimeOffset.MinValue.ToString(), _acceptableFormats, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTimeOffset dateTimeResult3);

        Console.WriteLine(canParseValue3);

        var canParseValue4 = DateTimeOffset.TryParseExact(DateTime.MinValue.ToString(), _acceptableFormats, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTimeOffset dateTimeResult4);

        Console.WriteLine(canParseValue4);

    }

}