title: Difference between compiling as C# 3.0 or ISO-1 or ISO-2?
body: <p>In Visual Studio 2010, under "Advanced Build Settings" there is the following options for "Language Version":</p>
  
  <ul>
  <li>default</li>
  <li>ISO-1</li>
  <li>ISO-2</li>
  <li>C# 3.0</li>
  </ul>
  
  <p>Is there any advantage to compiling as C# 3.0, e.g. benchmark speed or stability?</p>