XML Serialazer C# Silverlight

For some reason i ca´t use this class (XmlSerialazer) on my application on C# silverlig开发者_如何学Pythonht,they jus´t don´t get recognized. I am calling this librarys on my application

using System.Xml; using System.Text; using System.Xml.Serialization; using System.IO; I am pretty sure that all needed library is there, but still the problem why i can´t use this class? I have to install some ohter library?Or re-install Visual Studio? Or maybe look for another way to get the data on the xml file, if yes How? Thank you

Looking here, you need a reference to System.Xml.Serialization.dll - you mention a using directive, but it isn't clear whether you have a reference. Try adding that if missing.