Disable a string in array to prevent duplicates

Question

I have this application where i have to insert the same string in a textbox as the one in the array. The strings come by in a label, for every answer it will go to a random word/string that is in the array.

My question is: Is there any way to delete or disable a word/string in the array so I don't get any duplicates?

string[] arrProvincies = File.ReadAllLines(@"provincies.txt");
int counter = 0;
string Array = "";
string Array = arrProvincies[counter].ToString();
lblProvincie.Text = Array;
counter = rnd.Next(0, 12);

• Panagiotis Kanavos: Just call var provinces=arrProvincies.Distinct() to get distinct entries
• Panagiotis Kanavos: Prevent duplicates is not the same as random selection without repetition. What do you actually want?
• Gekkehond: I don't want to have the same string more then once.
• Panagiotis Kanavos: @Tuur you are looking for shuffling, generating a random order from the original list.

Answer 1

You can use a Queue:

Queue<string> arrProvincies = new Queue<string>(File.ReadAllLines(@"provincies.txt"));

And use it with lblProvincie.Text = arrProvincies.Dequeue();

Thus you'll be sure to have no duplicate since your remove the entry when you use it.

---

If you need shuffling:

Queue<string> arrProvincies = new Queue<string>(File.ReadAllLines(@"provincies.txt").OrderBy(o => Guid.NewGuid()));

• Panagiotis Kanavos: The OP is trying to retrieve entries randomly. The lines should be shuffled before loading in the queue
• Thomas Ayoub: @PanagiotisKanavos true, added info.
• Thomas Ayoub: @Tuur replace your declaration of arrProcincies with mine
• Gekkehond: Only problem is, it will go by the same order everytime, it might be shuffled, but that stays the same everytime
• Wyatt Earp: I think you want Guid.NewGuid() instead of new Guid(), as that will give you random Guids and not just Guid.Empty

Answer 2

string[] arrProvincies = File.ReadAllLines(@"provincies.txt");
var randomProvincies = arrProvincies.Distinct().OrderBy(i => Guid.NewGuid());

randomProvincies would be the distinct values ordered randomly (I couldn't understand the part where it says you would insert the same string in a textbox).