using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

​

public class Program

{

    public static void Main()

    {

​

        var x = Enumerable.Range(0,100);

        Parallel.ForEach(x,delegate(int y){

            Console.WriteLine(DoWork(y));

        });

    }

    static int DoWork(int x)

    {

        int largestPrime = 1;

        for(int i=1;i<x;i++)

        {

            if(x%i!=0){

                largestPrime=x;

            }

        }

               return largestPrime;

    }

}