Run a List of Task And Get Results

GetTaskResult-Program.cs

// See https://aka.ms/new-console-template for more information
using DoTaskAndGetResult;

Console.WriteLine("Hello, World!");

TestClass tc = new TestClass();

List<Task<TestData>> taskList = new List<Task<TestData>>();

for(int i = 0; i < 1000; i++)
{
    taskList.Add(tc.FillData(i.ToString()));
}

var ans = Task.WhenAll(taskList).Result;

foreach(var row in ans)
{
    // This will output a list of data. The input order will be sequential, but the processed times will vary (as they were dealt with in parallel)
    Console.WriteLine(row.OutputString);
}

TestClass.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DoTaskAndGetResult
{
    public class TestClass
    {

        public async Task<TestData> FillData(string input)
        {
            await Task.Delay(10);
            var i1 = input;
            var now = DateTime.UtcNow.ToString("HH:mm:ss.ffff");
            var output = $"{i1} processed at {now}";
            var td = new TestData(i1, output);
            return td;
            //return Task.FromResult(td);
        }

    }


    public class TestData
    {
        public TestData(){ }

        public TestData(string input, string output)
        {
            InputString = input;
            OutputString = output;
        }

        public string InputString { get; set; }

        public string OutputString { get; set; }
    }
}

Threading-With-Results.md

This shows how to run a multi threaded process and wait for the results of all tasks.