When working with Python and JavaScript, a common issue arises due to blocking the event loop. This occurs when code is executed in a single thread and only one synchronous operation can be performed at a time. Interestingly, this problem does not seem to exist in C#. Why is that? How does asynchrony in C# differ from JavaScript?
When working with asynchronous coding in c#, it is important to note that there are multiple threads involved. To ensure smooth operation, the code should either run on a background thread or utilize asynchronous IO provided by the operating system. This way, no actual thread is used for the operation.
In c# UI programs, there is still a UI thread with an event loop. If proper programming practices are not followed, it can lead to deadlock situations. For instance:
Task task = PerformAsyncOperation();
task.Wait(); // may cause deadlock if executed on the UI thread
The issue arises because the PerformAsyncOperation function might require access to the UI thread to complete its task, which is not feasible when waiting for a task to finish.
However, resolving this problem in c# is relatively straightforward:
Task task = PerformAsyncOperation();
await task; // Ensures no deadlock occurs
Thanks to the compiler's ability to transform methods into state machines, the risk of deadlock is eliminated.
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