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

For attributes to work the for loop for adding attribute should go after recursion, also need to check if IsNamespaceDeclaration:

private static XElement RemoveAllNamespaces(XElement xmlDocument)
{
    XElement xElement;

    if (!xmlDocument.HasElements)
    {
        xElement = new XElement(xmlDocument.Name.LocalName) { Value = xmlDocument.Value };
    }
    else
    {
        xElement = new XElement(xmlDocument.Name.LocalName, xmlDocument.Elements().Select(RemoveAllNamespaces));
    }

    foreach (var attribute in xmlDocument.Attributes())
    {
        if (!attribute.IsNamespaceDeclaration)
        {
            xElement.Add(attribute);
        }
    }

    return xElement;
}