How to specify an xmlns for XDocument?
The way the XDocument API works with namespace-scoped names is as XName instances. These are fairly easy to work with, as long as you accept that an XML name isn't just a string, but a scoped identifier. Here's how I do it:
var ns = XNamespace.Get("http://example.com");var doc = new XDocument(new XDeclaration("1.0", "utf-8", null));var root = new XElement(ns + "root1", new XElement(ns + "a", "b"));doc.Add(root);Result:
<root1 xmlns="http://example.com"> <a>b</a></root1>Note the + operator is overloaded to accept an XNamespace and a String to result in and XName instance.