Unclear statement

What do you exactly mean by this statement:
"This API supports the product infrastructure and is not intended to be used directly from your code."
Should this class not be used to create an XmlSerializer? If not, then please explain why not, and provide a link to the recommended alternative.

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#### Document Details

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* ID: e6f5a804-c8cc-b9e1-5c28-c9bfee1e9aaa
* Version Independent ID: 187d56a5-51ad-694a-438c-d43a912701e1
* Content: [XmlSerializerFactory Constructor (System.Xml.Serialization)](https://docs.microsoft.com/en-us/dotnet/api/system.xml.serialization.xmlserializerfactory.-ctor?view=netframework-4.7.2)
* Content Source: [xml/System.Xml.Serialization/XmlSerializerFactory.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System.Xml.Serialization/XmlSerializerFactory.xml)
* Product: **dotnet-api**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **dotnetcontent**

Iniziare da xml/System.Xml.Serialization/XmlSerializerFactory.xml e rivedere la documentazione del costruttore XmlSerializerFactory collegata nell’issue. Chiarire se i chiamanti devono usare questa classe per creare un XmlSerializer, spiegare la restrizione se applicabile e includere il link all’alternativa consigliata; la documentazione deve rispondere direttamente alla domanda del segnalatore.

Scritto dal modello di indicizzazione a partire dal testo della issue.