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    <p>Something like this:</p> <pre><code>public class Randomizer&lt;T&gt; { private readonly Random _random = new Random(); private readonly IList&lt;T&gt; _numbers; public Randomizer(IList&lt;T&gt; numbers) { _numbers = numbers; } public T Next() { int idx = _random.Next(0, _numbers.Count); return _numbers[idx]; } } </code></pre> <p>Usage:</p> <pre><code>var r = new Randomizer&lt;int&gt;(new int[] { 10, 20, 30, 40, 50 }); for (int i = 0; i &lt; 100; i++) Console.Write(r.Next() + " "); </code></pre> <p>Or do you want to <a href="https://stackoverflow.com/questions/108819/best-way-to-randomize-a-string-array-in-c">shuffle the array</a>?</p> <p><strong>[Edit]</strong></p> <p>To shuffle the array, you can use the <a href="http://en.wikipedia.org/wiki/Knuth_shuffle" rel="nofollow noreferrer">Fisher–Yates shuffle</a> shown in <a href="https://stackoverflow.com/questions/108819/best-way-to-randomize-a-string-array-in-c/110570#110570">this post</a>:</p> <pre><code>// https://stackoverflow.com/questions/108819/110570#110570 public class Shuffler { private Random rnd = new Random(); public void Shuffle&lt;T&gt;(IList&lt;T&gt; array) { int n = array.Count; while (n &gt; 1) { int k = rnd.Next(n); n--; T temp = array[n]; array[n] = array[k]; array[k] = temp; } } } </code></pre> <p>If you want the interface to be same as the <code>Randomizer</code> class above, you can modify it to use the <code>Shuffler</code> class:</p> <pre><code>public class Randomizer&lt;T&gt; { private readonly Shuffler _shuffler = new Shuffler(); private readonly IList&lt;T&gt; _numbers; public Randomizer(IList&lt;T&gt; numbers) { _numbers = new List&lt;T&gt;(numbers); _shuffler.Shuffle(_numbers); } volatile int idx = 0; public T Next() { if (idx &gt;= _numbers.Count) { _shuffler.Shuffle(_numbers); idx = 0; } return _numbers[idx++]; } } </code></pre> <p>Note that the code is <strong>not thread safe</strong>, so some locking should be implemented if <code>Next</code> method might be called simultaneously from multiple threads.</p>
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    1. COok, it works but also i want to kick number that randomizer generate from array for not repeating.
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    2. CO@ActuallyMAB: then you are talking about shuffling the array ([link to an SO answer is at the end of my post](http://stackoverflow.com/questions/108819/best-way-to-randomize-a-string-array-in-c)). Could you clarify what should happen when all array numbers are depleted? Should it reshuffle and restart? Or throw an exception?
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    3. COactually i want to not repeating numbers. for example result cant be like this: 5-9-5-12.
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