How to remove all namespaces from XML with C#?

Question

I am looking for the clean, elegant and smart solution to remove namespacees from all XML elements? How would function to do that look like?

Defined interface:

Answer 1

I think this is shortest answer(but for constuctions like , you will have another discussion, I also have regex to convert "" to "" but it wasn't optimized, If someone ask me I will share it. So, my solution is:

    public string RemoveAllNamespaces(string xmlDocument)
    {
        return Regex.Replace(xmlDocument, @"\sxmlns(\u003A\w+)?\u003D\u0022.+\u0022", " ");
    }