Generating random, unique values C#

Question

I\'ve searched for a while and been struggling to find this, I\'m trying to generate several random, unique numbers is C#. I\'m using System.Random, and I\'m us

Answer 1

Depending on what you are really after you can do something like this:

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

namespace SO14473321
{
    class Program
    {
        static void Main()
        {
            UniqueRandom u = new UniqueRandom(Enumerable.Range(1,10));
            for (int i = 0; i < 10; i++)
            {
                Console.Write("{0} ",u.Next());
            }
        }
    }

    class UniqueRandom
    {
        private readonly List _currentList;
        private readonly Random _random = new Random();

        public UniqueRandom(IEnumerable seed)
        {
            _currentList = new List(seed);
        }

        public int Next()
        {
            if (_currentList.Count == 0)
            {
                throw new ApplicationException("No more numbers");
            }

            int i = _random.Next(_currentList.Count);
            int result = _currentList[i];
            _currentList.RemoveAt(i);
            return result;
        }
    }
}