modifying XML namespace

[RickBeddoe]

Hello

I have an XML document in which I need to change a namespace.

<root
xmlns:abc=

http://www.abc.com/20090930

>

Within the XML file I have elements within the abc namespace:

<abc:myElement>123456</abc:myElement>

I use the following code to modify the namespace:

XmlDocument myXmlDoc = new XmlDocument;
myXmlDoc.Load("myxml.xml");
XmlNamespaceManager nsmgr = new XmlNamespaceManager(XmlDoc.NameTable);
XmlNode rootXmlNode = myXmlDoc.SelectSingleNode("/*[local-name()='root']",nsmgr);
XmlNode abcNode = rootXmlNode.Attributes.GetNamedItem("xmlns:abc");
abcNode.Attributes.SetNamedItem(abcNode).Value = "

http://www.abc.com/20091231";

So, hopefully you can see from this that I'm changing the namespace value from

http://www.abc.com/20090930

to

http://www.abc.com/20091231.

Now, when I save the file:

myXmlDoc.Save(xmlFilename);

an attribute for the namespace gets added to the element:

<abc:myElement xmlns:abc="

http://www.abc.com/20090930">123456</abc:myElement>

This is causing a big problem as the namespace is already defined as

http://www.abc.com/20091230

in the root element.

I've tried using XmlWriter but the results are the same.