ASP.NET 生成 RSS Feed

　　前段时间在写RSS Feed。

　　经过了几次的修改，把相关的代码写成了单独的类。感觉重用时还算比较方便的。于是贴出来，大家一起研究研究。以下是RssBase.cs类：

  1using System;
  2using System.Collections.Generic;
  3using System.Xml;
  4
  5namespace MyMedia.Utilities
  6{
  7    public class RssBase
  8    {
  9        RssBase constructor#region RssBase constructor
 10        public RssBase(XmlTextWriter rssWriter)
 11        {
 12            this.rssWriter = rssWriter;
 13        }
 14        public RssBase(XmlTextWriter rssWriter, bool hasMedia, IList<ItemInfo> items)
 15        {
 16            this.rssWriter = rssWriter;
 17            this.hasMedia = hasMedia;
 18            this.items = items;
 19        }
 20        #endregion
 21
 22        [Serializable]
 23        public sealed class ItemInfo
 24        {
 25            ItemInfo constructor#region ItemInfo constructor
 26            public ItemInfo() { }
 27            public ItemInfo(string itemTitle, string itemLink, string itemDescription, string itemPubDate, string itemAuthor, string itemGuid)
 28            {
 29                this.itemTitle = itemTitle;
 30                this.itemLink = itemLink;
 31                this.itemDescription = itemDescription;
 32                this.itemAuthor = itemAuthor;
 33                this.itemGuid = itemGuid;
 34                this.itemPubDate = itemPubDate;
 35            }
 36            public ItemInfo(string itemTitle, string itemLink, string itemDescription, string itemPubDate, string itemAuthor,
 37                            string itemGuid, string mediaContentUrl, string mediaTitle, string mediaDescription,
 38                            string mediaThumbUrl, string mediaThumbWidth, string mediaThumbHeight, string mediaAuthor)
 39            {
 40                this.itemTitle = itemTitle;
 41