How do you configure deadlines and cancellation for gRPC calls, and how does this differ from typical HTTP request timeouts?

gRPC clients specify a deadline (an absolute point in time by which the call must complete) rather than a simple duration-based timeout, and this deadline is automatically propagated through the entire call chain if a server-side method itself makes further downstream gRPC calls -- meaning if service A calls service B which calls service C, all with a shared deadline, C automatically knows how much time budget remains from the original caller's perspective, letting the whole call chain fail fast consistently rather than each hop having its own independent, potentially conflicting timeout.

var deadline = DateTime.UtcNow.AddSeconds(5);
var response = await client.GetOrderAsync(request, deadline: deadline);

// If GetOrder's server implementation calls ANOTHER gRPC service,
// the remaining deadline automatically propagates to that downstream call too,
// so the whole chain respects the original 5-second budget