A Real Timespan Object With .Years & .Months

Question

Consider the following 2 scenarios: Scenario 1). Today is May 1st 2012, and Scenario 2). Today is September 1st 2012.

Now, consider that we write on our webpage the

Answer 1

Using .Net 4.5 and the CultureInfo class, one can add months and years to a given date.

DateTime datetime = DateTime.UtcNow;
int years = 15;
int months = 7;

DateTime yearsAgo = CultureInfo.InvariantCulture.Calendar.AddYears(datetime, -years);
DateTime monthsInFuture = CultureInfo.InvariantCulture.Calendar.AddMonths(datetime, months);

Since that's a lot of typing, I prefer to create extension methods:

public static DateTime AddYears(this DateTime datetime, int years)
{
    return CultureInfo.InvariantCulture.Calendar.AddYears(datetime, years);
}

public static DateTime AddMonths(this DateTime datetime, int months)
{
    return CultureInfo.InvariantCulture.Calendar.AddMonths(datetime, months);
}

DateTime yearsAgo = datetime.AddYears(-years);
DateTime monthsInFuture = datetime.AddMonths(months);