durable-4-error-handling.cs

[FunctionName("SequentialWorkflow")]
public static async Task Sequential([OrchestrationTrigger] DurableOrchestrationContext context)
{
    var conf = await context.CallActivityAsync<ConfTicket>("BookConference", "ServerlessDays");
    try
    {
        var itinerary = MakeItinerary(/* ... */);
        await context.CallActivityAsync("BookFlight", itinerary);
    }
    catch (FunctionFailedException)
    {
        var alternativeItinerary = MakeAnotherItinerary(/* ... */);
        await context.CallActivityAsync("BookFlight", alternativeItinerary);
    }
    await context.CallActivityAsync("BookHotel", flight.Dates);
}