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C# Nullable Datetime
Using the DateTime nullable type, you can assign the null literal to the DateTime type.
A nullable DateTime is specified using the following question mark syntax.
DateTime?
The following is the code to implement Nullable Datetime.
Example
using System; class Program { static void Main() { DateTime? dt = null; DateFunc(dt); dt = DateTime.Now; DateFunc(dt); dt = null; Console.WriteLine(dt.GetValueOrDefault()); } static void DateFunc(DateTime? dt) { if (dt.HasValue) { Console.WriteLine(dt.Value); } else { Console.WriteLine(0); } } }
Output
0 9/17/2018 8:27:07 AM 1/1/0001 12:00:00 AM
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