Aspectacular.RelativeTimeSpanExtensions.Add C# (CSharp) Method

        public static DateTime Add(this DateTime dt, int count, TimeUnits unit)
        {
            switch (unit)
            {
                case TimeUnits.Century:
                    return dt.AddYears(count * 100);
                case TimeUnits.Day:
                    return dt.AddDays(count);
                case TimeUnits.Decade:
                    return dt.AddYears(count * 10);
                case TimeUnits.Hour:
                    return dt.AddHours(count);
                case TimeUnits.Minute:
                    return dt.AddMinutes(count);
                case TimeUnits.Month:
                    return dt.AddMonths(count);
                case TimeUnits.Quarter:
                    return dt.AddMonths(count * 3);
                case TimeUnits.Second:
                    return dt.AddSeconds(count);
                case TimeUnits.Week:
                    return dt.AddDays(count * 7);
                case TimeUnits.Year:
                    return dt.AddYears(count);
            }

            throw new Exception("Adding \"{0}\" is not implemented.".SmartFormat(unit));
        }