如何用SyndicationItem在c#中创建rss编码内容

using System.ServiceModel.Syndication;

SyndicationItem item = new SyndicationItem();
item.Title = new TextSyndicationContent("文章标题");
item.Summary = new TextSyndicationContent("文章摘要");
item.PublishDate = DateTime.Now;

item.Authors.Add(new SyndicationPerson("作者名称"));
item.Links.Add(new SyndicationLink(new Uri("文章链接")));
item.Content = new TextSyndicationContent("文章内容");

SyndicationFeed feed = new SyndicationFeed();
feed.Title = new TextSyndicationContent("Feed标题");
feed.Description = new TextSyndicationContent("Feed描述");
feed.Items.Add(item);

using (var writer = XmlWriter.Create("feed.xml"))
{
    feed.SaveAsRss20(writer);
}