How to Avoid System.Threading.ThreadAbortException During Response.Redirect?

Handling System.Threading.ThreadAbortException in ASP.NET Redirects

Using Response.Redirect() in ASP.NET can sometimes throw a System.Threading.ThreadAbortException. This happens because the server terminates the current page execution after the redirect. Setting endResponse to true in Response.Redirect() avoids the exception, but allows unnecessary processing after the redirect, which is inefficient.

The Best Approach

The ideal solution is to use Response.Redirect() with endResponse set to false, followed by Context.ApplicationInstance.CompleteRequest(). This cleanly redirects without the exception:

Response.Redirect(url, false);
Context.ApplicationInstance.CompleteRequest();

This tells the IIS pipeline to immediately proceed to the EndRequest stage, preventing further processing of the current page.

Further Reading

For a more detailed explanation, including handling redirects within an Application_Error handler, see Thomas Marquardt's insightful blog post (link to blog post would be inserted here if available). This approach ensures efficient and exception-free redirects in your ASP.NET applications.

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