http://blogs.msdn.com/b/henrikn/archive/2012/08/07/httpclient-httpclienthandler-and-httpwebrequesthandler.aspxIn two previous blogs I describe how to use HttpClient as well as how to use the HttpMessageHandler pipeline . What we haven’t done explicitly is showing when and how to use HttpClient , HttpClientHandler , and WebRequestHandler . This is the purposeen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/henrikn/archive/2012/08/07/httpclient-httpclienthandler-and-httpwebrequesthandler.aspx#10371540Mon, 26 Nov 2012 11:16:25 GMT91d46819-8472-40ad-a661-2c78acb4018c:10371540Andy Pook - Artesian<p>None to the sample code explicitly disposes of the client of response which was important when using WebClient.</p> <p>Could you confirm that this is no longer critical.</p> <p>Also is HttpClient thread-safe? Should I create a new instance for every request or can I safely make multiple calls through the same one?</p> <p>Thanks</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10371540" width="1" height="1">http://blogs.msdn.com/b/henrikn/archive/2012/08/07/httpclient-httpclienthandler-and-httpwebrequesthandler.aspx#10365163Fri, 02 Nov 2012 09:48:08 GMT91d46819-8472-40ad-a661-2c78acb4018c:10365163Nicholas Rogoff<p>Much appreciated articles. Thank you.</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10365163" width="1" height="1">http://blogs.msdn.com/b/henrikn/archive/2012/08/07/httpclient-httpclienthandler-and-httpwebrequesthandler.aspx#10338722Sat, 11 Aug 2012 14:09:37 GMT91d46819-8472-40ad-a661-2c78acb4018c:10338722Henrik F Nielsen<p>Darrel, that&#39;s correct although the default ctor of HttpClient uses an HttpClientHandler. Let me think of a way to describe that.</p> <p>Henrik</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10338722" width="1" height="1">http://blogs.msdn.com/b/henrikn/archive/2012/08/07/httpclient-httpclienthandler-and-httpwebrequesthandler.aspx#10338666Sat, 11 Aug 2012 02:07:20 GMT91d46819-8472-40ad-a661-2c78acb4018c:10338666Darrel Miller<p>Wouldn&#39;t it be more correct to say HttpClientHandler sits on top of HttpWebRequest rather than HttpClient. &nbsp;Arguably, HTTPClient has no dependency on HttpWebRequest. &nbsp;HttpClient could use a completely new HTTP engine if someone built it.</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10338666" width="1" height="1">http://blogs.msdn.com/b/henrikn/archive/2012/08/07/httpclient-httpclienthandler-and-httpwebrequesthandler.aspx#10337923Wed, 08 Aug 2012 15:38:42 GMT91d46819-8472-40ad-a661-2c78acb4018c:10337923How about passing in Forms authenticated credentials?<p>Hi Henrik,</p> <p>Can you show an example of how to pass in forms authentication credentials using the classes you described?</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10337923" width="1" height="1">http://blogs.msdn.com/b/henrikn/archive/2012/08/07/httpclient-httpclienthandler-and-httpwebrequesthandler.aspx#10337759Wed, 08 Aug 2012 06:04:06 GMT91d46819-8472-40ad-a661-2c78acb4018c:10337759Web blog of Janine Patterson<p>Thanks for taking the time to discuss that, I really feel strongly about it and love learning more on this topic.</p> <p> <a rel="nofollow" target="_new" href="http://janinepatterson.com/">http://janinepatterson.com/</a></p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10337759" width="1" height="1">