using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

    public static DateTimeOffset ConvertDateTimeStingToDateTimeOffset(string dateTimeString)

{

    // Step 1: Parse as DateTimeOffset with RoundtripKind (preserves precision & offset if included)

    if (DateTimeOffset.TryParse(

            dateTimeString,

            CultureInfo.InvariantCulture,

            DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal,

            out var dto))

    {

        return dto.ToOffset(TimeSpan.Zero); // Normalize to UTC

    }

​

    // Step 2: If that fails, parse as DateTime and force it as UTC with no shift

    if (DateTime.TryParse(

            dateTimeString,

            CultureInfo.InvariantCulture,

            DateTimeStyles.None, // Don't assume local or universal here

            out var dt))

    {

        // Force UTC kind and construct DateTimeOffset preserving ticks

        dt = DateTime.SpecifyKind(dt, DateTimeKind.Utc);

        return new DateTimeOffset(dt);

    }

​

    throw new InvalidOperationException($"Unable to parse input datetime: '{dateTimeString}'");

}

​

}