using System;

using System.Collections.Generic;

using System.Linq;

using System.Collections;

namespace Interview

{   

    public static class Utility

    {

        public static IList<int> IntegerList;

        public static bool ContainsDuplicates(IEnumerable<int> data)

        {

            // TODO: Given a collection of integers, return:

            //   True if any integer is in the collection more than once

            //   False if all integers are unique.

            var exist = data.Any(f=>f

            return false;

        }

        public static void Random()

        {

            IntegerList = new List<int>();

            for(int i=0; i<10; i++)

            {

                Random rnd = new Random();

                int rndNumber = rnd.Next(21);

                IntegerList.Add(rndNumber);

            }

        }

    }

    public static class Program

    {

        public static void Main()

        {

            // TODO: Implement a few tests of the function ContainsDuplicates here.

        }       

    }

}