throw-1.cs

// <Snippet1>
using System;

public class NumberGenerator
{
   int[] numbers = { 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 };
   
   public int GetNumber(int index)
   {
      if (index < 0 || index >= numbers.Length) {
         throw new IndexOutOfRangeException();
      }
      return numbers[index];
   }
}
// </Snippet1>

namespace TestException
{
// <Snippet2>
using System;

public class Example
{
   public static void Main()
   {
      var gen = new NumberGenerator();
      int index = 10;
      try {
          int value = gen.GetNumber(index);
          Console.WriteLine($"Retrieved {value}");
      }
      catch (IndexOutOfRangeException e) 
      {
         Console.WriteLine($"{e.GetType().Name}: {index} is outside the bounds of the array");
      }
   }
}
// The example displays the following output:
//        IndexOutOfRangeException: 10 is outside the bounds of the array
// </Snippet2>
}