Invoking a Scheduled Task

[chef 3745]

I'm attempting to trigger a Scheduled Task. But, my code doesn't seem to doing the job.

 

I believe I'm correct in finding what I need in the ITaskManager, although I have look under IScheduledTasks

            var t = taskManager.ScheduledTasks;
            foreach (var task in t.Where(task => task.Name == "Scan Media Library"))
            {
                await taskManager.Execute(task);
            }