>>>>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?
>>>
>>>If both are not null, cast them back
>>>
>>>

>>>  age = (int) (((DateTime)currentDate - (DateTime)birthDate).TotalDays/365.25);
>>>

>>>
>>>or
>>>
>>>

>>>int age = (int)((currentDate.Value - birthDate.Value).TotalDays / 365.25);
>>>

>>
>>Thanks Gregory, that did it.
>
>
>A nullable(T) is a structure that has a property HasValue, which is true if it is not null
>
>If it is not null, its Value member contains the Value
>
>See http://msdn.microsoft.com/en-us/library/1t3y8s4s(VS.80).aspx
>http://msdn.microsoft.com/en-us/library/xkcd5cdk.aspx
>
>
>Only value types can be used for Nullable(T)

Thanks again