Async internals in .NET
summary
Explains how C# compiler turns a short async method into a ~130-line state machine, shows that no thread dedicated to running the task (tasks are promises, not threads), and digs into Task, TaskCompletionSource, SynchronizationContext and ValueTask allocation tradeoffs. Demonstrates deadlocks from capturing UI sync context and the rule use async all the way up — never call .Wait()/.Result. Builds a custom task scheduler plus synchronization context to await async void by converting continuations to tasks — the hack works and recovers exceptions.
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chapters (6)
- 0:00Start
- 1:13Async internals in .NET
- 5:31Task details
- 22:27State machine
- 34:09Deadlocks
- 41:26Exception handling
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