SyndicationFeed change namespace prefix from a10 to atom

Question

I am using System.ServiceModel.Syndication.SyndicationFeed to create an rss feed from which I get this: ``` ... ``` It is all working swimmingly, except for when I validate my feed. The validator complains about the a10 namespace prefix and suggests that I use atom instead. That sounds reasonable.. except I can't see a straightforward way of changing the prefix. Any ideas on ways of changing the prefix?

Accepted Answer

To specify a custom name for the atom extensions you need to disable SerializeExtensionsAsAtom on the feed formatter:

```
var formatter = feed.GetRss20Formatter();
formatter.SerializeExtensionsAsAtom = false;
```

Then you need to add the namespace

```
XNamespace atom = "http://www.w3.org/2005/Atom";

feed.AttributeExtensions.Add(new XmlQualifiedName("atom", XNamespace.Xmlns.NamespaceName), atom.NamespaceName);
```

And now you can start using the extensions

```
feed.ElementExtensions.Add(new XElement(atom + "link", new XAttribute("href", feedLink), new XAttribute("rel", "self"), new XAttribute("type", "application/rss+xml")));
```

Finally write the feed to the response stream:

```
formatter.WriteTo(new XmlTextWriter(Response.Output));
```

SyndicationFeed change namespace prefix from a10 to atom

Solution

Problem