All 20 Asynchronous Programming questions
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What is the difference between Task and Task<T>? What do the 'async' and 'await' keywords do, and how do they relate to each other? What is the difference between the async and await keywords in C#, and how do they work together? How do you run multiple async operations concurrently? Why does calling .Result or .Wait() on a Task risk causing a deadlock, particularly in ASP.NET (non-Core) or UI applications? What does ConfigureAwait(false) do, and when is it appropriate to use? How do you run multiple asynchronous operations concurrently and wait for all of them using Task.WhenAll? What are async streams in C#, and how does IAsyncEnumerable<T> differ from a regular IEnumerable<T> for handling large or slow data sources? Why can .Result or .Wait() deadlock, and what's the fix? How do you design for scalability and avoid thread-pool starvation?
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What does ConfigureAwait(false) do?

Intermediate

Answer

It resumes the continuation without capturing the synchronization context, avoiding a needless hop and reducing deadlocks. Use it in library code that doesn't touch UI/HttpContext.
var body = await h.GetStringAsync(url).ConfigureAwait(false);
Real-world example A reusable NuGet library uses it so apps that block on it don't deadlock.
All 20 Asynchronous Programming questions