PrintSequence

using System;

    class PrintSequence
    {
        static void Main()
        {
            Console.WriteLine("The first ten members of sequence are: ");
            for(int i=2;i<=11;i++)
            {
                if(i%2==0)
                {
                    Console.WriteLine(i);
                }
                else
                {
                    Console.WriteLine(-i);
                }
            }
            Console.WriteLine();
        }
    }