.NET Framework Standard Library Annotated Reference, Volume 1: Base Class Library and Extended Numerics Library

Example

using System;
using System.Collections;

namespace Samples
{
  public class InvalidOperationExceptionSample
  {
    public static void Main()
    {
      try
      {
        string[] strings = {"zero", "one", "two"};
        IEnumerator ie = strings.GetEnumerator();
        Console.Write("{0}", ie.Current);
      }
      catch(InvalidOperationException e)
      {
        Console.WriteLine("Exception: {0}", e);
      }
    }
  }
}

The output is

Exception: System.InvalidOperationException: Enumeration has not started. Call MoveNext.
   at System.SZArrayEnumerator.get_Current()
   at Samples.InvalidOperationExceptionSample.Main() in C:\Books\BCL\Samples\
System\InvalidOperationException\InvalidOperationException.cs:line 14