AddMonths()

DateTime System.DateTime.AddMonths ( int months )

inline

Definition at line 452 of file DateTime.cs.

    {
        if (months < -120000 || months > 120000)
        {
            throw new ArgumentOutOfRangeException("months", SR.ArgumentOutOfRange_DateTimeBadMonths);
        }
        GetDate(out var year, out var month, out var day);
        int num = year;
        int num2 = day;
        int num3 = month + months;
        if (num3 > 0)
        {
            int num4 = (int)((uint)(num3 - 1) / 12u);
            num += num4;
            num3 -= num4 * 12;
        }
        else
        {
            num += num3 / 12 - 1;
            num3 = 12 + num3 % 12;
        }
        if (num < 1 || num > 9999)
        {
            ThrowDateArithmetic(2);
        }
        uint[] array = (IsLeapYear(num) ? s_daysToMonth366 : s_daysToMonth365);
        uint num5 = array[num3 - 1];
        int num6 = (int)(array[num3] - num5);
        if (num2 > num6)
        {
            num2 = num6;
        }
        uint num7 = (uint)((int)(DaysToYear((uint)num) + num5) + num2 - 1);
        return new DateTime(((ulong)((long)num7 * 864000000000L) + UTicks % 864000000000L) | InternalKind);
    }

References System.SR.ArgumentOutOfRange_DateTimeBadMonths, System.array, System.DateTime, System.DateTime.DaysToYear(), System.Runtime.Serialization.Dictionary, System.DateTime.GetDate(), System.DateTime.InternalKind, System.DateTime.IsLeapYear(), System.L, System.DateTime.s_daysToMonth365, System.DateTime.s_daysToMonth366, System.DateTime.ThrowDateArithmetic(), System.DateTime.UTicks, and System.year.

Referenced by System.DateTimeOffset.AddMonths().