XmlSerializer Doesn't Serialize TimeSpan to XML Duration TypeSomebody said this is by design. Then this is another design flaw and evidence of the immaturity of .Net Framework?! Google for "convert XML duration type to TimeSpan" returned all kind of workarounds. The general idea is to use a helper string property to make the Dumb XmlSerializer happy. But some of them are just inappropriate due to the way the TimeSpan is converted to string. XML Schema type
