I've been able to serialize nullable doubles without an issue, and can serialize Lists of nullable other types, but can't serialize Lists of nullable doubles.

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KP Lee 9-Dec-14 16:37 9-Dec-14 16:37 When boxing a nullable field into a non-nullable field, it is critical that the boxed item isn't null before trying to box the non-null field or try-catch handles the problem. You should supply the consequences of ignoring that requirement in your article. For instance, outside of a try block executing int?

Tst = null; int tst2 = ( int)tst; results in: An unhandled exception of type ' System.InvalidOperationException' occurred in mscorlib.dll Additional information: Nullable object must have a value.Not executing this in a debug session might lose even more information on what went wrong. There are plenty of other boxing errors that should be pre-checked. Like byte x = (byte) 354; There are plenty of articles in CodeProject that are a rehash of documentation and information in books. If you are using them in your article, it should reference the exact sources you used, but I don't mind a re-hash of something I already know about. BeeGone 16-Oct-14 5:54 16-Oct-14 5:54 1. Never Post Untested Code. You cannot initialize the fields in a struct.

You should always write code with clearness and fullness especially when you pretend to be teaching others. Usage of lowercase in the typed struct and then with upper case in the where T definition is really bad. And this inconsistency goes throughout the code. This should never be in Code Project at all as this is by definition in the documentation of.NET Framework and MSDN everywhere. Just because you pick 2-3 pages from there doesn't mean you should make an article about it. And just because you find 10 - 15 people who are just starting coding you shouldn't feel proud about yourself as a good article writer.

The article is too similar to the Chapter 19 of the book 'CLR via C#, 3rd edition', written by Jeffrey Richter. Sequence of topics is equivalent, your article being shortened when dealing with operators. Just as an example, your article starts with: 'As we all know, a value type variable cannot be null. That's why they are called Value Type. Value type has a lot of advantages, however, there are some scenarios where we require value type to hold null also.In Java, java.Util.Date is a reference type, and therefore, the variable of this type can be set to null. However, in CLR, System.DateTime is a value type and a DateTime variable cannot be null. If an application written in Java wants to communicate a date/time to a Web service running on the CLR, there is a problem if the Java application sends null because the CLR has no way to represent this and operate on it.'

On the other hand, Chapter 19 in Richter's book (page 459) starts with: 'As you know, variable of value type can never be null; it always contains the value type's value itself. In fact, this is why they call these types value types. Unfortunately, there are some scenarios in which this is a problem.in Java, java.Util.Date is a reference type, and therefore, a variable of this type can be set to null. However, in CLR, System.DateTime is a value type and a DateTime variable cannot be null. F1 1991 Historic Edition Rfactor Mods. If an application written in Java wants to communicate a date/time to a Web service running the CLR, there is a problem if the Java application sends null because the CLR has no way to represent this and operate on it.' There is a number of completely transcribed or only slightly modified sentences. However, you didn't even mention any reference to Richter's book! The Elder Scrolls Iv Oblivion Highly Compressed Psp.