li>Object and collection initializers</li>
</ul>
<h2 id="section-4">4.0</h2>
<p><em>Released April 2010</em></p>
<ul>
<li>Dynamic binding</li>
<li>Named/optional arguments</li>
<li>Generic covariant and contravariant</li>
<li>Embedded interop types</li>
</ul>
<h2 id="section-5">5.0</h2>
<p><em>Released August 2012</em></p>
<ul>
<li>Asynchronous members</li>
<li>Caller info attributes</li>
</ul>
<h2 id="section-6">6.0</h2>
<p><em>Released July 2015</em></p>
<ul>
<li>Static imports</li>
<li>Exception filters<