is there proceed collect elements controlling wholly internal names linq-to-xml query?

lets assume have xml:

<?xml version="1.0" encoding="utf-8"?>
<tns:registryresponse status="urn:oasis:names:tc:ebxml-regrep:responsestatustype:failure"
    xmlns:tns="urn:oasis:names:tc:ebxml-regrep:xsd:rs:3.0"
    xmlns:rim="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0">
    <tns:registryerrorlist highestseverity="">
        <tns:registryerror codecontext="xdsinvalidrequest - dcoumentid unique."
            errorcode="xdsinvalidrequest"
            severity="urn:oasis:names:tc:ebxml-regrep:errorseveritytype:error"/>
    </tns:registryerrorlist>
 </tns:registryresponse>

to collect registryerrorlist element,

xdocument doc = xdocument.load(<path xml file>);
xnamespace ns = "urn:oasis:names:tc:ebxml-regrep:xsd:rs:3.0";
xelement errorlist = doc.root.elements( ns + "registryerrorlist").singleordefault();

but this

xelement errorlist = doc.root.elements("registryerrorlist").singleordefault();

is there proceed query but namespace element. basicly there something conceptially
similiar controlling local-name() xpath (i.e. //*[local-name()='registryerrorlist'])