Find the number of months between two dates in C#

Try This

DateTime startDate = new DateTime(2013, 7, 9);
       DateTime endDate = new DateTime(2013, 7, 9);
       int months = endDate.Subtract(startDate).Days / 30;

 or

((date1.Year- date2.Year)*12)+ date1.Month- date2.Month

or

date1.Subtract(date2).Days / (365.25 / 12)