title: DataContractSerializer - how to use it?
body: <p>I'm trying to find out, how implement serialization in C# for Windows Phone 8</p>
  
  <p>I have found <a href="https://stackoverflow.com/questions/5010191/using-datacontractserializer-to-serialize-but-cant-deserialize-back/">this</a> solution. But I have problem. I don't know how to use <strong>DataContractSerializer</strong>. When I put it to Visual Studio 2012 for Windows Phone, it highlights me it. I tried to add:</p>
  
  <pre><code>using System.Runtime.Serialization;
  </code></pre>
  
  <p>but it doesn't correct the issue.</p>
  
  <p>How correct this problem?</p>