SelectSingleNode returns null when tag contains xmlNamespace
You should use an XmlNamespaceManager in your call to SelectSingleNode(): XmlNamespaceManager ns = new XmlNamespaceManager(xmldoc.NameTable); ns.AddNamespace(“msbld”, “http://schemas.microsoft.com/developer/msbuild/2003”); XmlNode node = xmldoc.SelectSingleNode(“//msbld:Compile”, ns);