Atom entry with C#

How can I make an Atom entry with C# and .NET 4 ?

I need to make an entry with this structure:

<entry xmlns="http://www.w3.org/2005/Atom" xmlns:f="XXX:aaa"><title>title1</title><summary>summary1</summary></entry>

I tried to do this with SyndicationItem class but entry contains more info than I need:

SyndicationItem atom = new SyndicationItem();atom.Title = new TextSyndicationContent("test1", TextSyndicationContentKind.Plaintext);atom.Summary = new TextSyndicationContent("summary1");atom.AttributeExtensions.Add(new XmlQualifiedName("f", "http://www.w3.org/2000/xmlns/"), "XXX:aaa");XmlWriterSettings settings = new XmlWriterSettings();settings.Indent = true;settings.IndentChars = "";settings.NewLineOnAttributes = true;StringBuilder sb = new StringBuilder();XmlWriter xml = XmlWriter.Create(sb,settings);atom.SaveAsAtom10(xml);xml.Close();Console.WriteLine(sb.ToString());

And the result is:

<entry xmlns:f="XXX:aaa" xmlns="http://www.w3.org/2005/Atom"><id>uuid:34381971-9feb-4444-9e6a-3fbc412ac6d2;id=1</id><title type="text">title1</title> <summary type="text">summary1</summary><updated>2010-10-29T14:02:48Z</updated></entry>

How can I create atom entry object without , and type="*" to make it look exactly I want?

Can you help me to simplify the code?

Thanks!