// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002802/xelement-removeallnamespaces

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.IO;

using System.Linq;

using System.Text;

using System.Xml.Linq;

public class Program

{

    public static void Main()

    {

        XDocument xDocument = null;

        using (var ms = new MemoryStream(Encoding.Default.GetBytes("<z:test xmlns:z=\"http://www.w3.org/TR/html4/\"><z:test2 /></z:test>")))

        {

            xDocument = XDocument.Load(ms);

        }

​

        XElement root = xDocument.Root;

​

        int result1 = root.Elements("test2").ToList().Count; // return 0;

        Console.WriteLine(result1);

        //C# Extension Method: XElement - RemoveAllNamespaces

        root = root.RemoveAllNamespaces(); // remove the "z" namespace

        int result2 = root.Elements("test2").ToList().Count; // return 1;

        Console.WriteLine(result2);

    }

}