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By mswatcher
via ericlippert.com
Published: Jan 08 2013 / 08:14

Last time on FAIC I described how the C# compiler elides the conversion from int to int? when you add an int? to an int, and thereby manages to save unnecessary calls to HasValue and GetValueOrDefault(). Today I want to talk a bit about another kind of nullable conversion that the compiler can optimize. Consider the following, in which w is an expression of type int? :
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