stop using async await in net to save threads code cop 018

the `codecop 018` warning in .net refers to a recommendation against the use of `async` and `await` in certain scenarios, particularly when it could lead to inefficient use of threads. this guide will help you understand when and why you might want to avoid `async` and `await`, as well as provide an example of more efficient alternatives.

understanding `async` and `await`

`async` and `await` are keywords in c that allow you to write asynchronous code easily. they enable non-blocking calls, which can help improve the responsiveness of applications, especially in ui or i/o-bound scenarios. however, improper usage can result in thread management issues, particularly in high-load scenarios, leading to performance bottlenecks.

when to avoid `async`/`await`

1. **cpu-bound operations**: if your operation is cpu-bound (i.e., it requires a lot of cpu processing), using `async`/`await` may not be beneficial. asynchronous methods are designed to free up threads waiting for i/o operations, but they don't help with cpu-bound tasks.

2. **short-lived tasks**: if the asynchronous operation is very short-lived, the overhead of managing the task asynchronously may outweigh the benefits.

alternative approaches

in scenarios where you might consider avoiding `async`/`await`, you can use other strategies such as:

- **synchronous methods**: if the operation can be performed synchronously without blocking the main thread, consider using synchronous methods.

example

here's an example demonstrating a scenario where `async`/`await` might not be the best ...

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