// Create empty project and set calculation mode to Manual
Project project = new Project();
project.CalculationMode = CalculationMode.Manual;

// Set project start date and add new tasks
project.Set(Prj.StartDate, new DateTime(2015, 4, 15));
Task task1 = project.RootTask.Children.Add("Task 1");
Task task2 = project.RootTask.Children.Add("Task 2");

// The necessary properties are set in manual mode
Console.WriteLine("Task1.Id Equals 1 : {0} ", task1.Get(Tsk.Id).Equals(1));
Console.WriteLine("Task1 OutlineLevel Equals 1 : {0} ", task1.Get(Tsk.OutlineLevel).Equals(1));
Console.WriteLine("Task1 Start Equals 15/04/2015 08:00 AM : {0} ", task1.Get(Tsk.Start).Equals(new DateTime(2015, 4, 15, 8, 0, 0)));
Console.WriteLine("Task1 Finish Equals 15/04/2015 05:00 PM : {0} ", task1.Get(Tsk.Finish).Equals(new DateTime(2015, 4, 15, 17, 0, 0)));
Console.WriteLine("Task1 Duration Equals 1 day : {0} ", task1.Get(Tsk.Duration).ToString().Equals("1 day"));
Console.WriteLine("Task2 Start Equals 15/04/2015 08:00 AM : {0} ", task2.Get(Tsk.Start).Equals(new DateTime(2015, 4, 15, 8, 0, 0)));
Console.WriteLine("Task2 Finish Equals 15/04/2015 05:00 PM : {0} ", task2.Get(Tsk.Finish).Equals(new DateTime(2015, 4, 15, 17, 0, 0)));
Console.WriteLine("Task2 Duration Equals 1 day : {0} ", task2.Get(Tsk.Duration).ToString().Equals("1 day"));

// When we link two tasks together their dates are not recalculated in manual mode
TaskLink link = project.TaskLinks.Add(task1, task2, TaskLinkType.FinishToStart);

// Task 2 Start has not been changed
Console.WriteLine("Task1 Start Equals Task2 Start : {0} ", task1.Get(Tsk.Start).Equals(task2.Get(Tsk.Start)));
Console.WriteLine("Task1 Finish Equals Task2 Finish : {0} ", task1.Get(Tsk.Finish).Equals(task2.Get(Tsk.Finish)));