Nullable Types

Some articles on nullable types, types, nullable:

C Sharp Syntax - Types - Reference Types - Nullable Types
... Nullable types were introduced in C# 2.0 firstly to enable value types to be null when working with a database ... int? n = 2 n = null Console.WriteLine(n.HasValue) In reality this is the same as using the Nullable struct ... Nullable n = 2 n = null Console.WriteLine(n.HasValue) ...
C Sharp Syntax - Dialects - Spec# - Non-nullable Types
... Spec# extends C# with non-nullable types that simply checks so the variables of nullable types that has been set as non-nullable are not null ...

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