C# - Get date difference of Nullable DateTime in int

Question

I have two DateTime variables of Nullable types.

DateTime? date1 = new DateTime();
DateTime? date2 = new DateTime();

I need to get the differe

Answer 1

I would write something like:

int? daysBetweenDate = date1.HasValue && date2.HasValue ? (int?)(date2.Value - date2.Value).TotalDays : null;

So daysBetweenDate is null if at least one of date1 and date2 is null.