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Editorial Team
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Asked: 2026-06-13T21:26:07+00:00

I am working on ASP.NET project and yesterday I saw a piece of code

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I am working on ASP.NET project and yesterday I saw a piece of code that uses System.Threading.Thread to offload some tasks to a new thread. The thread runs a few SQL statements and logs the result.

Isn’t it better to use another approach? For example to have a Windows Service that performs the SQL batch. Then the web page will just enqueue the batch (via WCF).

In general, what are the best practices for multithreading in ASP.NET? Are there justified usages of threads/TPL tasks/etc. in a web page?

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  1. Editorial Team

    My thought when using multi-threading in ASP.NET:

    1. ASP.NET recycles AppDomain for some reasons like you change web.config or in the period of time to avoid memory leak. The thing is you don’t know which exact time of recycle. Long running thread is not suitable because when ASP.NET recycles it will take your thread down accordingly. The right approach of this case is long running task should be running on background process via Queue, like you mention.

    2. For short running and fire and forget task, TPL or async/await are the most appropriate because it does not block thread in thread pool to utilize for HTTP requests.

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