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What are the differences between the XSD to runtime type mapping used by XML serialization and those used by ADO.NET or XSD validation?

April 26, 2017ADO.NET differences Mapping runtime serialization type Used validation XML XSD

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What are the differences between the XSD to runtime type mapping used by XML serialization and those used by ADO.NET or XSD validation?

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The mappings from W3C XML Schema types to runtime types used by the dataset and schema validation are described in the Data Type Support between XML Schema (XSD) Types and .NET Framework Types topic. This mapping is different from those used when XML serialization attributes are specified on the fields and properties of a class. Each of the XML serialization attributes has its mapping from objects to W3C XML Schema types defined in the description for the DataType property for that class. This includes the descriptions of the SoapAttributeAttribute.DataType property , SoapElementAttribute.DataType property, XmlArrayItemAttribute.DataType property, XmlAttributeAttribute.DataType property, XmlElementAttribute.DataType property, and XmlRootAttribute.DataType property. A major difference is that the Gregorian dates, such as xs:gMonth and xs:gYear, are mapped to strings by XML serialization, whereas validation maps them to DateTime objects. Another difference is that the DTD-based list type