Question

Possible Duplicate:
DateTime “null” value

is it possible to set datetime object to null?

Answer 1

DateTime is a value type, which, just like int and double, has no meaningful null value.

In VB.NET, you can write this:

Dim d As DateTime = Nothing

But all this does is to set d to the default DateTime value. In C# the equivalent code would be this:

DateTime d = default(DateTime);

…which is equivalent to DateTime.MinValue.

That said, there is the Nullable<T> type, which is used to provide a null value for any value type T. The shorthand for Nullable<DateTime> in C# is DateTime?.