using System;
using System.Threading.Tasks;
public class Program
{
public static async Task Main()
Task doOne = new Task(() => Run(1));
Task doTwo = new Task(() => Run(2));
doOne.Start();
doTwo.Start();
await Task.WhenAll(doOne, doTwo);
}
public static void Run(int num){
for(int i = 0; i < 1_000; i++) {
Console.WriteLine(num);