How to use XML namespace prefixes without xmlns="..." everywhere? (.NET)

<xsl:template match="//interfaces/interface[@name='management']/inet-address">
     ... 
</xsl:template> 

<?xml version="1.0" encoding="utf-8" standalone="no"?>
<resources>
<!--
  This file is automatically generated by Crashlytics to uniquely 
  identify individual builds of your Android application.

  Do NOT modify, delete, or commit to source control!
-->
<string xmlns:ns0="http://schemas.android.com/tools" name="com.crashlytics.android.build_id" ns0:ignore="UnusedResources,TypographyDashes" translatable="false">xxxxxxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx</string>
</resources>

var doc = XDocument.Load(@"C:\Temp\Source.xml");

doc.Descendants().Attributes().Where(x => x.IsNamespaceDeclaration).Remove();
doc.Root.Add(new XAttribute(XNamespace.Xmlns + "root", "urn:root:v1"));
doc.Root.Add(new XAttribute(XNamespace.Xmlns + "loc", "urn:location:v2"));

doc.Save(@"C:\Temp\Target.xml");