ImportNode creates empty xmlns attribute

Question

Regrading this code:

   var tmpNewNode = xdoc.ImportNode(newNode, true);

    if (oldNode.ParentNode != null)
    {
        oldNode.ParentNode.ReplaceChild(tmpNe         


        

Answer 1

I got the sames problem when I created an XmlElement like here

XmlElement xmlElement = myXmlDocument.CreateElement("MyElemenent");
myXmlDocument.AppendChild(xmlElement);

after this I got the attribute xmlns="" after saving.

If I use the namespace of the document I could suppress this xmlns attribute.

XmlElement xmlElement = myXmlDocument.CreateElement("MyElemenent",myXmlDocument.DocumentElement.NamespaceURI);
myXmlDocument.AppendChild(xmlElement);

Without the empty xmlns="" my SelectNodes didn't work anymore because the namespace needs to be specified. Solution for this is here (using-xpath-with-default-namespace)