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Create `common-async-bugs.md` — from "Psychic Debugging of Async Methods." Covers the 4 most common bugs: method runs synchronously despite `async`, can't await `void`, deadlocks with `SynchronizationContext`, `Task<Task>` unwrapping. Also incorporate mentions of UI deadlocks (from "Await and UI and deadlocks") and static constructor deadlocks as warning notes. 1. Create `async-lambda-pitfalls.md` — from "Potential pitfalls to avoid when passing around async lambdas." Covers: async lambdas assigned to `Action` delegates (becomes async void), `Parallel.ForEach` with async lambdas, `Task.Factory.StartNew` returning `Task<Task>`. 1. Decompose relevant Async/Await FAQ content into both articles (FAQ answers about async void, `Task.Wait` vs `await`, the `async` keyword not forcing asynchrony). 1. Add both to TOC. Consider grouping under a new "Best practices and troubleshooting" sub-section.
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Contributes to #17714
common-async-bugs.md— from "Psychic Debugging of Async Methods." Covers the 4 most common bugs: method runs synchronously despiteasync, can't awaitvoid, deadlocks withSynchronizationContext,Task<Task>unwrapping. Also incorporate mentions of UI deadlocks (from "Await and UI and deadlocks") and static constructor deadlocks as warning notes.async-lambda-pitfalls.md— from "Potential pitfalls to avoid when passing around async lambdas." Covers: async lambdas assigned toActiondelegates (becomes async void),Parallel.ForEachwith async lambdas,Task.Factory.StartNewreturningTask<Task>.Task.Waitvsawait, theasynckeyword not forcing asynchrony).Internal previews