using System;

​

public class Program

{

    public static void Main(string[] args)

    {

        var array = GenerateArray();

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

            Console.WriteLine("x[{0}] = {1}", i, array[i]);

        Console.ReadLine();

    }

​

    private static bool Contains(int[] array, int value)

    {

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

        {

            if (array[i] == value) return true;

        }

        return false;

    }

    private static int[] GenerateArray(){

        int[] x = new int[9];

        Random r = new Random();

​

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

        {

            int next;

            while (true)

            {

                next = r.Next(10);

                if (!Contains(x, next)) break;                    

            }

​

            x[i] = next;

        }

        return x;

    }

}