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DataContractSerializer deserialization puzzle - by-pass member initialization.

Posted By:      Posted Date: August 28, 2010    Points: 0   Category :.NET Framework
 
Hi, I was using WCF and during the transmission of a object, of the type Book, see code below, the deserialization process throws a NullReferenceException. To isolate the problem, I uses a unit test like this rather than involving the full blown WCF marshalling. This appears to be solely a serialization/deserialization problem and has nothing to do with the communication issues in WCF. [Test] public void TestSerializeAndDeserializeBook() {     Book book = new Book( "Testing Serialization and Deserialization",                         new Person( 100, "Tom", "Smith" ),                         new Person( 101, "Peter", "Pan" ) );     DataContractSerializer ser = new DataContractSerializer( typeof(Book) );     using( Stream stm = new MemoryStream() )     {         ser.WriteObject( stm, book );         stm.Seek( 0, SeekOrigin.Begin );         Book regen = ser.ReadObject( stm ) as Book; // NullReferenceException here     &nb


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Deserializing with DataContractSerializer by-pass member initialization?

  
Hi,

I am really puzzled to understand why a member's initializer that constructs an instance of List<T> is not executed resulting in a NullReferenceException when I deserialize Book class, listed below. The DataContract is as follows and the comment indicates where  NullReferenceException is thrown :

namespace Bookshop {
    [ DataContract ]
    public class Book {
        string title;
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