http://blogs.msdn.com/b/bclteam/archive/2012/06/04/what-s-new-in-the-bcl-in-the-net-framework-4-5-immo.aspxIf I were a Microsoft executive I would probably introduce this post with &ldquo;I&rsquo;m super excited to announce&hellip;&rdquo; but I&rsquo;m not. I&rsquo;m just an engineer. Well, an incredibly proud engineer nonetheless. In any case, I&rsquo;m proudlyen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/bclteam/archive/2012/06/04/what-s-new-in-the-bcl-in-the-net-framework-4-5-immo.aspx#10322939Fri, 22 Jun 2012 13:32:41 GMT91d46819-8472-40ad-a661-2c78acb4018c:10322939Immo Landwerth [MSFT]<p>Nodir: Good catch! :-)</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10322939" width="1" height="1">http://blogs.msdn.com/b/bclteam/archive/2012/06/04/what-s-new-in-the-bcl-in-the-net-framework-4-5-immo.aspx#10319194Wed, 13 Jun 2012 06:18:12 GMT91d46819-8472-40ad-a661-2c78acb4018c:10319194Nodir<p>I think you meant &quot;sneak peek&quot;, not &quot;sneak peak&quot;</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10319194" width="1" height="1">http://blogs.msdn.com/b/bclteam/archive/2012/06/04/what-s-new-in-the-bcl-in-the-net-framework-4-5-immo.aspx#10319063Tue, 12 Jun 2012 21:05:27 GMT91d46819-8472-40ad-a661-2c78acb4018c:10319063BCL Team<p>Hi Andrew,</p> <p>thanks for reporting this issue. After talking to the owners of the networking APIs it turns out this is a known limitation of the existing networking APIs. They already file a bug for this and will consider it for the next release.</p> <p>Thanks,</p> <p>Immo Landwerth</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10319063" width="1" height="1">http://blogs.msdn.com/b/bclteam/archive/2012/06/04/what-s-new-in-the-bcl-in-the-net-framework-4-5-immo.aspx#10315915Wed, 06 Jun 2012 13:41:01 GMT91d46819-8472-40ad-a661-2c78acb4018c:10315915Andrew<p>Let me rephrase that: the Async methods of TcpClient&#39;s underlying NetworkStream don&#39;t seem the respect the CancellationToken...</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10315915" width="1" height="1">http://blogs.msdn.com/b/bclteam/archive/2012/06/04/what-s-new-in-the-bcl-in-the-net-framework-4-5-immo.aspx#10315911Wed, 06 Jun 2012 13:32:21 GMT91d46819-8472-40ad-a661-2c78acb4018c:10315911Andrew<p>Great work all. Many of the BCL types have been given Async methods. However, many types, such as TcpClient, don&#39;t seem to respect the CancellationToken that these methods are passed. This means you can end up with tasks that simply never end - and can&#39;t be cancelled. Please can you let us know what your guidance is for dealing with these cases.</p> <p>thanks, Andrew</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10315911" width="1" height="1">