Why Task introduced
in C#?
.net framework
provides System.Threading.Tasks.Task class to let you create threads and run
them asynchronously. Queuing a work item to a thread pool is useful, but there
is no way to know when the operation has finished and what the return value is.So
that the reason Microsoft introduced the concept of Task.
Task is an object
that represents some work that should be done.
Example:
public class Program {
public static void
Main() {
// use an Action delegate and named method
Task task1 =
new Task(new Action(printMessage));
// use an anonymous delegate
Task task2 =
new Task(delegate { printMessage() });
// use a lambda expression and a named method
Task task3 =
new Task(() => printMessage());
// use a lambda expression and an anonymous
method
Task task4 =
new Task(() => { printMessage() });
task1.Start();
task2.Start();
task3.Start();
task4.Start();
Console.WriteLine("Main
method complete. Press <enter> to finish.");
Console.ReadLine();
}
private static
void printMessage() {
Console.WriteLine("Hello, world!");
}
}