title: System.Runtime.serialization.dll not found on visual studio 2010
body: <p>I have a class type project on my solution, and it has a reference to System.Runtime.Serialization, but, I can't find this dll on my Visual Studio to reference on the project.</p>
  
  <p>Windows is 7 ultimate and is up to date, and my visual studio is up to date too.</p>
  
  <p>Can anyone please help me with this issue?</p>