The XmlSerializer in the .NET Framework is a great tool to map strongly structured XML data to .NET objects. The XmlSerializer performs the transformations between XML documents and objects in your program with a single API call. The mapping rules for the transformation are expressed in the .NET classes via metadata attributes. This programming model comes with its own class of errors that developers need to learn how to diagnose. For example, the metadata attributes have to describe all variations of an XML format that a serializer can process. This article examines the various errors that can occur when building XML based solutions with the XmlSerializer, and discusses techniques and tools to diagnose them.
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