i want generate not repeat random

[HelloValue]

this is my code：

public static string ItemCode(this Randomizer r)
{
			var itemcodes = new[] {
				"CL","NA","K","ALT","AST","ALP","TBIL",
				"ALB","PA","CRE","MG","PHO","CA","PHO","LDH","BUN","TBA"
			};
			return r.ArrayElement(itemcodes);
}

var testitemsFaker = new Faker<TestItem>()
			 .RuleFor(o => o.ItemCode, f => f.Random.ItemCode());

 var items = testitemsFaker.Generate(f.Random.Number(3,7));

i expect items return different itemcode.

[bchavez]

If you don't want to repeat random values, then you need to maintain state:

void Main()
{
   var testitemsFaker = new Faker<TestItem>()
             .RuleFor(o => o.ItemCode, f => f.Random.ItemCode());

   while( true )
   {
      testitemsFaker.Generate().Dump();
   }
}

public static List<string> ItemCodes = new List<string>(){ "ALT","PA","CRE","MG" };

public class TestItem
{
   public string ItemCode;
}

public static class ExtensionsForBogus
{
   public static string ItemCode(this Randomizer r)
   {
      if (ItemCodes.Count == 0) throw new Exception("No more item codes without repeating.");
      var i = r.Number(min: 0, max: ItemCodes.Count - 1);
      var val = ItemCodes[i];
      ItemCodes.RemoveAt(i);
      return val;
   }
}

[HelloValue]

thanks.