C# question mark operator postfixed to cast

Question

I was looking at the dapper page and saw this terse bit of coding:

   new { Age = (int?)null, Id = guid });

What does (int?)null do?

Could someone please elucidate what is going on there, and perhaps give a more "verbose" version of the code?

Answer 1

int? is shorthand for Nullable<int>. as such this line of code is converting null (which by default is of type object) to a null int.

Docs: http://msdn.microsoft.com/en-us/library/b3h38hb0.aspx