Nullable type and if issue

Question

Here is simplest piece of code

Dim testInvoiceDate As DateTime? = If(String.IsNullOrEmpty(Nothing),
                                      Nothing,
                   


        

Answer 1

Nothing in VB.Net is the equivalent of default(T) in C#: the default value for the given type.

• For value types, this is essentially the equivalent of 'zero': 0 for Integer, False for Boolean, DateTime.MinValue for DateTime, ...
• For reference types, it is the null value (a reference that refers to, well, nothing).

Asigning Nothing to a DateTime therefore is the same as assigning it DateTime.MinValue