Generate 9 values with different values

Hello, I want to generate 9 numbers in array in range from 1 to 9 but with different value(e.g. 8,2,3,1,6,5,9,4,7 so there won't be the same value somewhere)

This is what I tried, but it doesn't work, it still generate sometimes the same number as previous

Code (CSharp):

1. for (int x = 0; x <= 8; x++)
2.         {
3.             Number[x] = Random.Range(1, 10);
4.          }
5.  
6. for (int x = 0; x <= 8; x++)
7.         {
8.             for (int z = 0; z <= 8; z++)
9.             {
10.                 if (x == z)
11.                 {
12.                 }
13.                 else
14.                 {
15.                     while (Number[x] == Number[z])
16.                     {
17.                         Number[x] = Random.Range(1, 10);
18.                         print("Changed Number to: " + Number[x]);
19.                         repeat++;
20.                         print("Changed "+ repeat + " times");
21.                     }
22.                     repeat = 0;
23.                 }
24.             }
25.         }

Thank you for any help.

 

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class NumberGenerator : MonoBehaviour
6. {
7.     public void Start()
8.     {
9.         HashSet<int> numbers = new HashSet<int>();
10.         while (numbers.Count< 9)
11.         {
12.             int number = Random.Range(1, 10);
13.             if (!numbers.Contains(number)) numbers.Add(number);
14.         }
15.  
16.         foreach (int number in numbers)
17.         {
18.             Debug.Log(number);
19.         }
20.     }
21.  
22. }

This is only 1 method (not fastest) you could also simply shuffle the 9 numbers in their slots

 

Guessing in while loop is very slow.

Get your numbers and then shuffle:

Code (CSharp):

1. var values = Enumerable.Range(1, 9).ToArray();
2. values.Shuffle();

Shuffle extention here:
https://stackoverflow.com/questions/273313/randomize-a-listt

 

Here the shuffle version too:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class NumberGenerator : MonoBehaviour
6. {
7.     public void Start()
8.     {
9.         //GenerateByHash();
10.         GenerateByShuffle();
11.      }
12.  
13.     public void GenerateByShuffle()
14.     {
15.         int[] numbers = new int[9];
16.         int index = 0;
17.         foreach (int number in numbers)
18.         {
19.             numbers[index] = index + 1;
20.             index++;
21.         }
22.  
23.         ShuffleArray(numbers); // you can call this shuffle method several times to get better or other random results, but normally it should be enough
24.  
25.         foreach (int number in numbers)
26.         {
27.             Debug.Log(number);
28.         }
29.     }
30.  
31.     // Shuffles 9 times 2 slots
32.     public void ShuffleArray(int[] numbers)
33.     {
34.         int index = 0;
35.         foreach (int number in numbers)
36.         {
37.             int slotValue = numbers[index];
38.             int rndIndex = Random.Range(0, 9);
39.             numbers[index] = numbers[rndIndex];
40.             numbers[rndIndex] = slotValue;
41.             index++;
42.         }
43.     }
44.  
45.     public void GenerateByHash()
46.     {
47.         HashSet<int> numbers = new HashSet<int>();
48.         while (numbers.Count < 9)
49.         {
50.             int number = Random.Range(1, 10);
51.             if (!numbers.Contains(number)) numbers.Add(number);
52.         }
53.  
54.         foreach (int number in numbers)
55.         {
56.             Debug.Log(number);
57.         }
58.     }
59.  
60. }