How to add a namespace when parsing string to Xelement?

Question

I'm looking to set a namespace to the Xelement below. How to achieve it?

string Namespace = "http://mynamespace";
string defaultXml = "<ReferResult><Text> Testing Referred</Text></ReferResult>"

Xelement myXml = XElement.Parse(defaultXml);

// How to add the name space to myXml?

Answer 1

XNamespace Namespace = "http://mynamespace";
string defaultXml = "<ReferResult><Text> Testing Referred</Text></ReferResult>";

XElement myXml = XElement.Parse(defaultXml);
myXml.Name = Namespace + myXml.Name.LocalName;

//If you want the children to have the same namespace, use the following.
//If you want only the parent to have the namespace, omit the code bellow 
foreach(var element in myXml.Descendants()){
    element.Name = Namespace + element.Name.LocalName;
}

//Output:
//<ReferResult xmlns="http://mynamespace">
//    <Text> Testing Referred</Text>
//</ReferResult>

Edit: As OP's requested in the comments, to remove the namespaces, just use the same code, but omiting the namespace part:

myXml.Name = myXml.Name.LocalName;
foreach(var element in myXml.Descendants()){
    element.Name = element.Name.LocalName;
}