I don’t know if you’ve ever had a problem with trying to store a null value in a value type in .NET. If you have, you may be interested to know that there is a generic type wrapper in .NET which can sort the problem out. It is called Nullable.
You can use it like this (in VB.NET)
Dim n as Nullable(of Integer)
You can then use the HasValue property on it to see if it has a value, and the Value property to retrieve the value. You can also assign to and from it as normal, including assigning Nothing/null to it.
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In C# it’s similar – you declare the variable as e.g. Nullable<int> n;
However, you can also use the following notation:
int? n;
The ‘?’ is short-hand for ‘Nullable’.
[...] Studio 2008 or whether I just missed it completely in 2005, but I have just noticed that you can do Nullables in VB.NET the same way you can in [...]