Response.Redirect and ThreadAbortException: How to Avoid it Gracefully?

System.Threading.ThreadAbortException and Response.Redirect: A Practical Guide

Using Response.Redirect() to redirect web pages can sometimes trigger a System.Threading.ThreadAbortException. This happens because the server stops processing the current page's remaining code after initiating the redirect.

While setting endResponse to false in Response.Redirect(url, false) prevents this exception, it can lead to unnecessary resource consumption as the server continues to process the original page.

The Recommended Approach

The most efficient solution combines Response.Redirect(url, false) with Context.ApplicationInstance.CompleteRequest(). This ensures a clean redirect without executing any further code on the original page:

<code class="language-csharp">Response.Redirect(url, false);
Context.ApplicationInstance.CompleteRequest();</code>

This method cleanly signals IIS to move to the EndRequest phase, effectively ending the original page's processing.

For a deeper dive into this topic, including best practices for handling redirects within Application_Error handlers, consult Thomas Marquardt's detailed blog post (link to be provided if available).

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