using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {       

        var dates = new DateTime(2012, 10, 01, 10, 0, 0).Range(new DateTime(2012, 11, 15));

​

        foreach (var d in dates)

        {

            var horarioLocal = ConvertToBrazilianTime(d);

            Console.WriteLine("UTC: " + d.ToString("dd-MM-yyyy HH-mm-ss") + " - Local BR: " + horarioLocal.ToString("dd-MM-yyyy HH-mm-ss"));

        }

    }

​

    public static DateTime ConvertToBrazilianTime(DateTime utc)

    {

        return TimeZoneInfo.ConvertTimeBySystemTimeZoneId(utc, "E. South America Standard Time"); // Brasilia/BRA

    }

}

​

public static class ExtensionMethods

{

    public static IEnumerable<DateTime> Range(this DateTime startDate, DateTime endDate)

    {

        return Enumerable.Range(0, (endDate - startDate).Days + 1).Select(d => startDate.AddDays(d));

    }

}