Question

I am newbie to parallel programming. I write the basic code below but it doesnt run always as I excepted.

Console.WriteLine ("Start");

Task task = Task.Factory.StartNew(() => {

  for (int i = 0; i < 5; i++)
{
    Console.WriteLine (i);
}

});

Console.WriteLine ("End");

I usually could not get the result of the loop 8-9 out of 10 trials. Sometimes it prints the loop results, sometimes not. But I it always prints the Start and End. Whats happening at the behind side ? Why sometimes I could not get the result of loop from time to time ?

Thanks in advance,

Answer 1

Your program is terminating before the parallel loop gets a chance to print any output.

Console.WriteLine ("Start");
Task task = Task.Factory.StartNew(() => {
for (int i = 0; i < 5; i++)
{
    Console.WriteLine (i);
}
});

Console.ReadLine();
Console.WriteLine("End");

Pause by waiting for input, and you’ll see the loop run correctly.