using System;

public class Program

{

    public static void Main()

    {

        var result = TimeZoneInfo.ConvertTimeToUtc(DateTime.SpecifyKind(DateTime.UtcNow.AddHours(-1), DateTimeKind.Unspecified), System.TimeZoneInfo.FindSystemTimeZoneById("E. South America Standard Time"));

        Console.WriteLine(result);

    }

}