C#根据出生日期计算年龄的代码

给出用户的出生日期，计算出用户的年龄，C#代码简单实用

public int CalculateAgeCorrect(DateTime birthDate, DateTime now)
{
    int age = now.Year - birthDate.Year;
    if (now.Month < birthDate.Month || (now.Month == birthDate.Month && now.Day < birthDate.Day)) age--;
    return age;
}