using System; namespace Extensions { public static class DateTimeExtensions { public static int Age(this DateTime birthDate) { return Age(birthDate, DateTime.Today); } public static int Age(this DateTime birthDateTime, DateTime atDateTime) { var birthDate = birthDateTime.Date; var atDate = atDateTime.Date; var age = atDate.Year – birthDate.Year; if (birthDate.AddYears(age) > atDate) { age–;…