Skip to content
Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

blocking

A thread standing still, doing nothing, while it waits for something.

A blocking call holds its thread until the awaited work completes, so the thread can do nothing else in the meantime.

Loading interactive…

Examples

  • Thread.Sleep(1000); blocks the thread for a second; await Task.Delay(1000); waits just as long without blocking it.

Read the full section →