Hi,

I am trying to write a method that will calculate the age of someone. Here is my code:

        /// <summary>
        /// Calculates the Nearest Age
        /// </summary>
        /// <param name="birthDate">Date of Birth</param>
        /// <param name="currentDate">Current Date</param>
        /// <returns></returns>
        public Int GetAgeNearest(DateTime? birthDate, DateTime? currentDate)
        {
            int age = 0;
            if (birthDate != null && currentDate != null)
            {
                age = (int) ((currentDate - birthDate).TotalDays/365.25);
            }
            return age;
        }

And here is the error:

'System.Nullable<System.TimeSpan>' does not contain a definition for 'TotalDays' and no extension method 'TotalDays' accepting a first argument of type 'System.Nullable<System.TimeSpan>' could be found (are you missing a using directive or an assembly reference?)

The problem I guess is that I am allowing null values to be passed in (that is what the ? does at the end of the parameter type, isn't it).

How do I handle this?