public void RegisterActivity(string name, string taskListName) { var listActivityRequest = new ListActivityTypesRequest() { Domain = domainName, Name = name, RegistrationStatus = RegistrationStatus.REGISTERED }; var results = swfClient.ListActivityTypesAsync(listActivityRequest).Result; if (results.ActivityTypeInfos.TypeInfos.FirstOrDefault(x => x.ActivityType.Name == name) == null) { RegisterActivityTypeRequest request = new RegisterActivityTypeRequest() { Name = name, Domain = domainName, Description = "Custom Description Here", Version = "1.0", DefaultTaskList = new TaskList() { Name = taskListName }, //Worker poll based on this DefaultTaskScheduleToStartTimeout = "150", DefaultTaskStartToCloseTimeout = "450", DefaultTaskHeartbeatTimeout = "NONE", DefaultTaskScheduleToCloseTimeout = "350" }; swfClient.RegisterActivityTypeAsync(request); Console.WriteLine("Created Activity: " + request.Name); } }