ShuffleNumbersFrom1ToN

using System;

/// <summary>
/// Write a program that enters in integer n and prints the numbers 1, 2, …, n
/// in random order.
/// </summary>
public class RandomizeTheNumbers
{
    public static void CreateArray(int n)
    {
        int[] numbers = new int[n];

        // Fill up 'numbers' array
        for (int i = 0; i < n; i++)
        {
            numbers[i] = i + 1;
        }

        Shuffle(numbers);

        // Print out the shuffled array
        for (int i = 0; i < n; i++)
        {
            Console.Write(numbers[i] + " ");
        }
    }

    public static void Shuffle<T>(T[] array) // Fisher-Yates Shuffle
    {
        Random rng = new Random();
        var random = rng;
        for (int i = array.Length; i > 1; i--)
        {
            // Pick random element to swap.
            int j = random.Next(i); // 0 <= j <= i-1
            // Swap.
            T tmp = array[j];
            array[j] = array[i - 1];
            array[i - 1] = tmp;
        }
    }

    static void Main()
    {
        Console.WriteLine("Give me a integer n and I will give you you ther integer 1 - n in random order.");
        Console.Write("n = ");
        int n = int.Parse(Console.ReadLine());

        CreateArray(n);
    }
}