XDocument获取指定节点

string xmlFile = @"D:\Documents\Visual Studio 2013\Projects\Jesee.Web.Test\ConsoleApplication1\XMLFile1.xml";
XDocument doc = XDocument.Load(xmlFile);
XElement xroot = doc.Root;//根节点
var nodes = xroot.Descendants().FirstOrDefault(a => a.Name.LocalName == "SubjectName");