linq to xml(添加节点3)

LinqToXmlHelper linqToXmlHelper = new LinqToXmlHelper();
Province province = new Province() { Name = "广东省", Capital = "广州市" };
City city = new City() { Name = "广州市", Code = "020", Province = province };
IList<District> districts = new List<District>()
{ new District() {City = city, Name = "天河区", Description = "天河区的描述"}, new District() {City = city, Name = "越秀区", Description = "越秀区的描述"}

};
linqToXmlHelper.AddElement(districts);
XElement xElement = linqToXmlHelper.Load();
Console.WriteLine(xElement.ToString());
Console.ReadKey();