workflow1.cs

[FunctionName("ProcessFileFlow")]
public static async Task RunOrchestrator(
    [OrchestrationTrigger] IDurableOrchestrationContext context,
    ILogger log)
{
    var uploadApprovedEvent = context.WaitForExternalEvent<bool>("UploadApproved");
    await Task.WhenAny(uploadApprovedEvent);
    
    log.LogInformation("File Ready");
}