The difference between await Task.Delay(TimeInterval).ConfigureAwait(false) and await Task.Delay(TimeInterval).ConfigureAwait(true) lies in the context in which the continuation of the method will execute.
await Task.Delay(TimeInterval).ConfigureAwait(false): This tells the runtime that the continuation doesn't need to run in the original context captured at the start of the async method. This means that the continuation can execute on any available thread, which can lead to better performance, particularly in library code that needs to avoid deadlocks. However, it also means that you cannot access any context-specific resources (like UI elements in a Windows Forms or WPF app) from within the continuation 2, 5.
await Task.Delay(TimeInterval).ConfigureAwait(true): This tells the runtime that the continuation should run in the original context captured at the start of the async method. This means that the continuation will execute on the same thread that started the async method, and it will have access to the same context-specific resources. However, this can lead to potential deadlocks if the original context is blocked waiting for the async method to complete 2, 5.
Using .ConfigureAwait(false) can be beneficial in scenarios where you're developing a library that will be used by other applications.
Consider the following scenario: You're developing a library that includes an asynchronous method. This method uses await to wait for an asynchronous operation to complete. Inside this method, you're using ConfigureAwait(false), which means that the rest of the method can continue running on any available thread when the awaited task completes.
Now,
let's say that a developer uses your library in their application. They
call your asynchronous method from their own synchronous method.
Because your method is asynchronous and uses ConfigureAwait(false), it doesn't capture the original context and can complete on any thread.
This means that when your method finishes and control returns to the caller, the caller can also continue on any thread. This can help to avoid potential deadlocks that can occur if the caller was waiting for the method to complete on the original context (for example, the UI thread in a desktop application).
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