DateTime Extention Method

public static class DateTimeExtentions
{
	public static bool Between(this DateTime dt, DateTime rangeBeg, DateTime rangeEnd)
	{
		return dt.Ticks >= rangeBeg.Ticks && dt.Ticks <= rangeEnd.Ticks;
	}

	public static int CalculateAge(this DateTime dateTime)
	{
		var age = DateTime.Now.Year - dateTime.Year;
		if (DateTime.Now < dateTime.AddYears(age))
			age--;
		return age;
	}

	public static int Age(this DateTime dateOfBirth)
	{
		if (DateTime.Today.Month < dateOfBirth.Month ||
		DateTime.Today.Month == dateOfBirth.Month &&
		 DateTime.Today.Day < dateOfBirth.Day)
		{
			return DateTime.Today.Year - dateOfBirth.Year - 1;
		}
		else
			return DateTime.Today.Year - dateOfBirth.Year;
	}

	public static string ToReadableTime(this DateTime value)
	{
		var ts = new TimeSpan(DateTime.UtcNow.Ticks - value.Ticks);
		double delta = ts.TotalSeconds;
		if (delta < 60)
		{
			return ts.Seconds == 1 ? "one second ago" : ts.Seconds + " seconds ago";
		}
		if (delta < 120)
		{
			return "a minute ago";
		}
		if (delta < 2700) // 45 * 60
		{
			return ts.Minutes + " minutes ago";
		}
		if (delta < 5400) // 90 * 60
		{
			return "an hour ago";
		}
		if (delta < 86400) // 24 * 60 * 60
		{
			return ts.Hours + " hours ago";
		}
		if (delta < 172800) // 48 * 60 * 60
		{
			return "yesterday";
		}
		if (delta < 2592000) // 30 * 24 * 60 * 60
		{
			return ts.Days + " days ago";
		}
		if (delta < 31104000) // 12 * 30 * 24 * 60 * 60
		{
			int months = Convert.ToInt32(Math.Floor((double)ts.Days / 30));
			return months <= 1 ? "one month ago" : months + " months ago";
		}
		var years = Convert.ToInt32(Math.Floor((double)ts.Days / 365));
		return years <= 1 ? "one year ago" : years + " years ago";
	}

	public static bool WorkingDay(this DateTime date)
	{
		return date.DayOfWeek != DayOfWeek.Saturday && date.DayOfWeek != DayOfWeek.Sunday;
	}

	public static bool IsWeekend(this DateTime date)
	{
		return date.DayOfWeek == DayOfWeek.Saturday || date.DayOfWeek == DayOfWeek.Sunday;
	}

	public static DateTime NextWorkday(this DateTime date)
	{
		var nextDay = date;
		while (!nextDay.WorkingDay())
		{
			nextDay = nextDay.AddDays(1);
		}
		return nextDay;
	}

	public static DateTime Next(this DateTime current, DayOfWeek dayOfWeek)
	{
		int offsetDays = dayOfWeek - current.DayOfWeek;
		if (offsetDays <= 0)
		{
			offsetDays += 7;
		}
		DateTime result = current.AddDays(offsetDays);
		return result;
	}

	public static long GetTicksFromNow(this DateTime dtStart)
	{
		DateTime currentDate = DateTime.Now;
		long elapsedTicks = currentDate.Ticks - dtStart.Ticks;
		return elapsedTicks;
	}

}