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	<title>John Bennett&#039;s blog &#187; azure</title>
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		<title>Follow up on Silverlight and SaaS</title>
		<link>http://jtbennett.com/blog/2008/12/follow-up-on-silverlight-and-saas</link>
		<comments>http://jtbennett.com/blog/2008/12/follow-up-on-silverlight-and-saas#comments</comments>
		<pubDate>Sun, 14 Dec 2008 17:42:00 +0000</pubDate>
		<dc:creator>John</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[azure]]></category>
		<category><![CDATA[saas]]></category>
		<category><![CDATA[silverlight]]></category>

		<guid isPermaLink="false">http://173.203.71.169/blog/2008/12/follow-up-on-silverlight-and-saas/</guid>
		<description><![CDATA[Back in May, I wrote a post speculating about using Silverlight on the server to allow tenants in a multitenant SaaS application to write and run custom code on shared servers.&#160; Silverlight provides a subset of the full .NET framework &#8230; <a href="http://jtbennett.com/blog/2008/12/follow-up-on-silverlight-and-saas">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
			<content:encoded><![CDATA[<p>Back in May, I wrote a post speculating about <a href="http://jtbennett.com/blog/could-silverlight-be-used-as-a-server-side-sandbox-for-saas/">using Silverlight on the server</a> to allow tenants in a multitenant SaaS application to write and run custom code on shared servers.&nbsp; Silverlight provides a subset of the full .NET framework and provides a security sandbox &#8212; both very useful in that kind of scenario.</p>
<p>At the time I thought the idea was a little hare-brained.&nbsp; It had occurred to me while I was brushing my teeth one morning and it seemed interesting enough.&nbsp; I felt a little bit less hare-brained when <a href="http://www.hanselman.com/blog/">Scott Hanselman</a> posted in September about his discovery of <a href="http://www.hanselman.com/blog/WindowsLiveMeshSilverlightAndTheCoreCLR.aspx">Silverlight living outside the browser</a> in several ways, most notably the Mesh Operating Environment.</p>
<p>I&#8217;m pretty sure that MOE is the same thing as the Live Operating Environment that is part of the <a href="http://dev.live.com/liveframework/">Live Framework</a>.&nbsp; In effect, the LOE is a mini-CLR &#8212; just like Silverlight is.&nbsp; LOE lives either on a device (computer, phone, etc.) or on the Live Mesh servers.&nbsp; In both cases it provides a stripped down CLR with extra security.&nbsp; (I know this is an oversimplification, but I think it is generally correct.)</p>
<p>I feel even less crazy now that <a href="http://www.lhotka.net/weblog/default.aspx">Rocky Lhotka</a> has posted <a href="http://www.lhotka.net/weblog/SomeThoughtsOnWindowsAzure.aspx">Some thoughts on Windows Azure</a> and a <a href="http://www.lhotka.net/weblog/WindowsAzureAndTheValueOfRestrictedPlatformsarchitectures.aspx">follow up</a>.&nbsp; (The <a href="http://en.wikipedia.org/wiki/Marchitecture">marchitecture</a> diagram on the <a href="http://www.microsoft.com/azure/whatisazure.mspx">Windows Azure site</a> shows Live Services &#8212; which contains the LOE &#8212; as just one component that runs on top of Azure.&nbsp; I&#8217;m conflating the LOE and Azure, but I don&#8217;t think that affects the point.)&nbsp; Rocky says of Azure:</p>
<blockquote><p>Remember that we’re talking about a restricted runtime, with a restricted architecture and API. Basically a controlled subset of .NET. We’re already seeing this work – in the form of Silverlight.</p>
</blockquote>
<p>And later:</p>
<blockquote><p>So what we need, I think, is this server equivalent to Silverlight. Azure is not that &#8211; not today &#8211; but I think it may start us down that path, and that&#8217;d be cool!</p>
</blockquote>
<p>Scott and Rocky go much further than I did, and are certainly better writers.&nbsp; But with those two seeing the same coolness I do in the idea, I have much less reason to question my sanity.</p>
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