Summary

The current documentation on "How to create a document with namespaces in C# (LINQ to XML)" doesn't explain how to handle the creation of new XAttribute objects that are supposed to have the enclosing XElement's default namespace applied, e.g.:

<root xmlns="default/namespace">
  <element attribute="value"/>
</root>

Without documentation, there are two options that might be hypothetically applicable for creating the correct XML with LINQ to XML in C#:

1. XNamespace ns = new XNamespace("default/namespace");
   ...
   new XElement(ns + "element", new XAttribute(ns + "attribute", "value"))

2. XNamespace ns = new XNamespace("default/namespace");
   ...
   new XElement(ns + "element", new XAttribute("attribute", "value"))

This pull request amends one of the examples by including information on how to create XAttribute objects applying to a default namespace.

Fixes #44499
and dotnet/runtime#111703

Internal previews