====== Nullable Datatypes ======

Contrary to VO, many datatypes in the .NET Framework don't allow null values. 

One of the most important ones is the DataTime class, that cannot have a null value, contrarily to VO, where a date variable can contain null_date.

In the .NET Framework there is the ''Nullable'' datatype, defined as follows:
<code>Nullable<T></code>
and to be used like this:
<code>local dDate as Nullable<DateTime>

dDate := null
dDate := DateTime.Now</code>

Reference types in the .NET Framework don't need ''Nullable'', they already support null values.

For more information see [[https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/nullable-types/|docs.microsoft.com/en-us/dotnet/csharp/programming-guide/nullable-types/]]