.NET (Core and Framework)

Mike Dimmick wrote:

(MS07-040[^]).

<?xml version="1.0"?>
<configuration xmlns:br="http://microsoft.com/schemas/VisualStudio/TeamTest/2006">
	<br:connectionStrings>
		<add name="SQL" connectionString="SQL" />
	</br:connectionStrings>
	<connectionStrings>
		<add name="SQL2" connectionString="SQL2" />
	</connectionStrings>
</configuration>

using System;
using System.Xml;

namespace ConsoleApplication1
{
	class Program
	{
		static void Main(string[] args)
		{
			XmlDocument dom = new XmlDocument();
			XmlNamespaceManager manager = new XmlNamespaceManager(dom.NameTable);
			manager.AddNamespace("br", "http://microsoft.com/schemas/VisualStudio/TeamTest/2006");

			dom.Load("Web.config");

			XmlNode groupNode = dom.DocumentElement.SelectSingleNode("br:connectionStrings", manager);

			if (groupNode == null)
				Console.WriteLine("(null)");
			else
				Console.WriteLine(groupNode["add"].Attributes["name"].Value);
		}
	}
}

<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">

<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
  <connectionStrings>
		<add name="SQL" connectionString="SQL" />
	</connectionStrings>
</configuration>

using System;
using System.Xml;

namespace ConsoleApplication1
{
	class Program
	{
		static void Main(string[] args)
		{
			XmlDocument dom = new XmlDocument();
			dom.Load("Web.config");

			XmlNamespaceManager manager = new XmlNamespaceManager(dom.NameTable);
			manager.AddNamespace("default", "http://schemas.microsoft.com/.NetConfiguration/v2.0");

			XmlNode node = dom.DocumentElement.SelectSingleNode("default:connectionStrings", manager);

			if (node == null)
				Console.WriteLine("(null)");
			else
				Console.WriteLine(node.OuterXml);
		}
	}
}