Generate random double number between 0.0 and 1.0, then check the frequence in CSharp

using System;//  w  w w  .j  a v  a 2s  . c  o  m

public class Example
{
   public static void Main()
   {
      int[] frequency = new int[10];
      double number;
      Random rnd = new Random();

      for (int ctr = 0; ctr <= 99; ctr++) {
         number = rnd.NextDouble();
         frequency[(int) Math.Floor(number*10)] ++;
      }

      for (int ctr = frequency.GetLowerBound(0); ctr <= frequency.GetUpperBound(0); ctr++)
         Console.WriteLine("0.{0}0-0.{0}9       {1}", ctr, frequency[ctr]);
   }
}