using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

            double[] numbers = new double[] { 1, 2, 3, 4, 5 };

            Console.WriteLine("non normailzed: " + String.Join(",", numbers.Select(c => c.ToString()).ToArray()));

            Normalize(numbers);

            Console.WriteLine("normailzed: " + String.Join(",", numbers.Select(c => c.ToString()).ToArray()));

    }

​

    static void Normalize(double[] numbers)

    {

        double max = numbers.Max();

        for (int i = 0; i < numbers.Length; i++)

        {

            numbers[i] = numbers[i] / max;

        }

    }

}

​