How To Consume RSS Feeds

I am facing problem to consume rss feeds, I found several articles on How to consume RSS feeds, they helped me to some extened but I didn't get info for what exactly i am looking. My problem is: I tried to consume feeds from these two [URL]

I've used this code to get the feeds info XmlTextReader readerSport = new XmlTextReader [URL]

DataSet dsSport = new DataSet();
dsSport.Clear();
dsSport.ReadXml(readerSport);

for both the feed dataset have same 8 tables but with diffrent names, and if i write the xml using the folloing code

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load("[URL]");
//xmlDoc.Load("[URL]");
xmlDoc.Save(Server.MapPath("~/sowetan.xml"));

after observing the genrated xml, both the xml have diffrent structure.

1. What information required to display the feed content?
2. if we have diffrent structures for the genrated xml how can we write a single transform method?
3. Is all the 8 tables data required for displayingrss content, In most article i found they've used only for table 3
4. I want to open the feed content on my webpage, how it can be done.