Async, concurrency và vòng đời tài nguyên

Nội dung luyện tập

• awaitable service contract
• completed await control flow
• scoped instance boundary
• cooperative cancellation
• whenall result order
• whenany inner failure
• worker unit of work scope
• dbcontext concurrency boundary
• async disposal on return
• compose cancellation budgets
• wait timeout versus operation
• release only acquired permit
• di thread safety responsibility
• valuetask single consumption
• context capture versus blocking
• http connection lifetime
• diagnose sync over async
• worker failure supervision
• background job ownership
• bounded downstream admission

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