Project project = new Project("New Project.mpp");

// Get a task to calculate its duration in different formats
Task task = project.RootTask.Children.GetById(1);

// Get the duration in Minutes, Days, Hours, Weeks and Months
double mins = task.Get(Tsk.Duration).Convert(TimeUnitType.Minute).ToDouble();
Console.WriteLine("Duration in Mins: {0}", mins);
double days = task.Get(Tsk.Duration).Convert(TimeUnitType.Day).ToDouble();
Console.WriteLine("Duration in Days: {0}", days);
double hours = task.Get(Tsk.Duration).Convert(TimeUnitType.Hour).ToDouble();
Console.WriteLine("Duration in Hours: {0}", hours);
double weeks = task.Get(Tsk.Duration).Convert(TimeUnitType.Week).ToDouble();
Console.WriteLine("Duration in Weeks: {0}", weeks);
double months = task.Get(Tsk.Duration).Convert(TimeUnitType.Month).ToDouble();
Console.WriteLine("Duration in Months: {0}", months);