Calculate two dates after several months and days

To calculate the number of days after two days, consider the number of days in each month. The number of days in each month is different.
Therefore, we can first calculate the number of months after the calculation, then accumulate the number of months with the start date, and then calculate the number of days with the difference.

Dim Odate1 As   Date   =   Date . Parse ( " 2008/5/1 " )
Dim Odate2 As   Date   =   Date . Parse ( " 2008/7/10 " )

' Calculate the month first
Dim Imonths As   Integer   =   Datediff (Dateinterval. Month, odate1, odate2)
' Remaining days
Dim Idays As   Integer   =   Datediff (Dateinterval. Day, Dateadd (Dateinterval. Month, imonths, odate1), odate2)

Msgbox ( String . Format ( " {0} months {1} Days " , Imonths, idays ))