title: Equivalent of Tuple (.NET 4) for .NET Framework 3.5
body: <p>Is there a class existing in .NET Framework 3.5 that would be equivalent to the .NET 4 <a href="http://msdn.microsoft.com/en-us/library/system.tuple.aspx" rel="noreferrer">Tuple</a>?</p>
  
  <p>I would like to use it in order to return several values from a method, rather than create a <code>struct</code>.</p>