public static async Task <List <string> > SimpleOrchestrator(
            [OrchestrationTrigger] ITypedDurableOrchestrationContext context)
        {
            var outputs = new List <string>();

            // Replace "hello" with the name of your Durable Activity Function.
            outputs.Add(await context.Activities.SayHello("Tokyo"));
            outputs.Add(await context.Activities.SayHello("Seattle"));
            outputs.Add(await context.Activities.SayHello("London"));

            return(outputs);
        }
        public async Task <int> Multiply(
            [OrchestrationTrigger] ITypedDurableOrchestrationContext context
            )
        {
            var(num1, num2) = context.GetInput <(int, int)>();

            var result = 0;

            for (var i = 0; i < num2; i++)
            {
                result = await context.Activities.Add(result, num1);
            }

            return(result);
        }