Problem 16.*Print Long Sequence

/*Problem 16.*Print Long Sequence
Write a program that prints the first 1000 members of the sequence: 2, -3, 4, -5, 6, -7, … 
You might need to learn how to use loops in C# (search in Internet).*/

using System;
class PrintLongSequence
{
    static void Main()
    {
        for (int i = 1; i <= 500; i++)
        {
            Console.Write(i * 2);
            Console.Write(",");
            Console.Write((i *(-2)) - 1);
            Console.Write(",");
        }
    }
}