title: System.IndexOutOfRangeException: 'Index was outside the bounds of the array.' in xamarin App
body: <p>I'm having an issue with this. I'm trying to generate a list with a number of symbols (needs to be 2 of each). Sometimes works and sometimes throws this error:</p>
  
  <blockquote>
    <p>System.IndexOutOfRangeException: 'Index was outside the bounds of the array.' </p>
  </blockquote>
  
  <p>Code:</p>
  
  <pre><code>static int[] letras = new int[16];
  
  string[] simbolo = new string[]{"A","B","A","B","C","D","C","D","E","F","E","F","G","H","G","H"};
  
  for (int i = 0; i &lt; letras.Length; i++){
      letras[i] = Convert.ToString(simbolo)[alea.Next(0, simbolo.Length)];
  }
  </code></pre>
  
  <p>It's a Xamarin C# application...</p>