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

Here is a regex based solution to this problem...

    private XmlDocument RemoveNS(XmlDocument doc)
    {
        var xml = doc.OuterXml;
        var newxml = Regex.Replace(xml, @"xmlns[:xsi|:xsd]*="".*?""","");
        var newdoc = new XmlDocument();
        newdoc.LoadXml(newxml);
        return newdoc;
    }