379 Generic Task

示例

Program.cs

using System.Diagnostics;
namespace TaskExample
{
    internal class Program
    {
        static void Main(string[] args)
        {
            UpCounter upCounter = new UpCounter();
            DownCounter downCounter = new DownCounter();
            int maxNo = 100;
            Task<long> t1 = Task<long>.Factory.StartNew(() =>
            {
                return upCounter.CountUp(maxNo);
            });
           
            Task<long> t2 = Task.Factory.StartNew(() =>
            {
                return downCounter.CountDown(maxNo);
            });
           
            //t1.Wait();  //Need to be waited for
            //t2.Wait();  //Need to be waited for
            //Task.WaitAll(new Task[] { t1, t2 });
            Task.WaitAll(t1, t2);
            Console.WriteLine($"t1: {t1.Result}");
            Console.WriteLine($"t2: {t2.Result}");
            Console.WriteLine("t1 and t2 completed.");
            Console.ReadKey();
        }
    }
    class UpCounter
    {
        public long CountUp(int count)
        {
            long sum = 0;
            Console.WriteLine("\nCount-Up starts.");
            for (int i = 1; i <= count; i++)
            {
                Console.Write($"Up: {i}, ");
                sum += i;
            }
            Console.WriteLine("\nCount-Up ends.");
            return sum;
        }
    }
    class DownCounter
    {
        public long CountDown(int count)
        {
            long sum = 0;
            Console.WriteLine("\nCount-Down starts.");
            for (int i = count; i >= 1; i--)
            {
                Console.Write($"Down: {i}, ");
                sum += i;
            }
            Console.WriteLine("\nCount-Down ends.");
            return sum;
        }
    }
}