using System;
using System.Globalization;
using System.Linq;
using System.Collections.Generic;

public class Test
{
    public static T[] UniqueRandomArray<T>(T[] input, Random rnd)
    {
        if (input.Length <= 1) throw new ArgumentException("Input array must have at least two elements, otherwise the output would be the same.", "input");
        IEnumerable<T> rndSeq;
        while (input.SequenceEqual(rndSeq = input.OrderBy(x => rnd.Next())));
        return rndSeq.ToArray();
    }

	public static void Main()
	{
        Random rnd = new Random();
        List<int[]> randomArrays = new List<int[]>();
        int[] arrayInt1 = { 1, 2, 3, 4, 5, 6, 7 };
        randomArrays.Add(arrayInt1);
        
        for (int i = 0; i < 10; i++)
        {
            int[] lastArray = randomArrays[randomArrays.Count - 1];
            int[] randomArray = UniqueRandomArray(lastArray, rnd);
            randomArrays.Add(randomArray);
        }
        foreach(int[] array in randomArrays)
        Console.WriteLine(String.Join(",",array.Select(i=>i.ToString()).ToArray()));
	}
}