根据Flickr的分享Url获取图片地址
string strUrl = "http://www.flickr.com/photos/anali_t/5617851444/";
Flickr.CacheDisabled = true;
Flickr.CacheLocation =System.Web.HttpContext.Current.Server.MapPath("~/FlickrCache");
Flickr flickr = new Flickr("key", "Secret");
SizeCollection sc = flickr.PhotosGetSizes("5617851444");
大图地址:sc[sc.Count-1].Source