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    <p>While there is a point to be made about minimizing impact on transactions and catering for the unforeseen in distributed transactions, in this example its really not necessary to reinvent IIS just because the process is long running. The whole "IIS can die at any moment" meme is IMHO greatly exaggerated. </p> <p>Yes, you can manually restart IIS or app pool but so can you restart any other service which does the same job for the same effect. As for auto-recycle IIS uses overlapping worker processes and will never terminate a started thread forcefully (unless time out occurs). If that were the case we would have serious problems with any hosted application (what's to stop IIS from killing a fast response thread 0.001ms after start)</p> <p>In essence, let the IIS do what IIS does best and don't insist on sync operation, you'll just waste pool's thread waiting for blocking I/O which is what I believe you are trying to avoid. You already made a good choice by going to Asynchronous Handlers (ASHX), use <code>IHttpAsyncHandler</code> implementation to spawn your custom thread which will then block to your heart's desire without affecting the web application and its pool. Once you initiate an async operation thread the asp.net thread will go back to its own pool and will be ready to start serving a new request. With a default limit of 100 threads in a pool and given that your process is low-on-cpu-high-on-bandwidth I doub't you'll ever run out of pool threads before you run out of pipe space :). For more information on how to build async handler check this link (its an old article but valid non the less):</p> <p><a href="http://msdn.microsoft.com/en-us/magazine/cc164128.aspx" rel="nofollow">Use Threads and Build Asynchronous Handlers in Your Server-Side Web Code</a></p>
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    1. POHow to create threads in ASP.NET pages from CLR thread pool instead of ASP.NET pool?
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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