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Eric Gunnerson posts about the Updated C# V2.0 Specifications now available. One new entry is nullable types, with which I have some experience already, in the form of luKa's Nullable Types library. The C# 2.0 version looks very similar (essentially a structure with the underlying type plus a boolean HasValue denoting null status). Of course the MS approach is a little more streamlined - for example they add a new null coalescing operator, ?? which works exactly like the SQL ISNULL function. Can't wait to have typed datasets and other generated code based on nullable types...