/// <summary>
        /// Run the code example.
        /// </summary>
        /// <param name="user">The DFP user object running the code example.</param>
        public override void Run(DfpUser user)
        {
            // Get the CustomFieldService.
            CustomFieldService customFieldService =
                (CustomFieldService)user.GetService(DfpService.v201405.CustomFieldService);

            // Set the ID of the drop-down custom field to create options for.
            long customFieldId = long.Parse(_T("INSERT_DROP_DOWN_CUSTOM_FIELD_ID_HERE"));

            // Create custom field options.
            CustomFieldOption customFieldOption1 = new CustomFieldOption();

            customFieldOption1.displayName   = "Approved";
            customFieldOption1.customFieldId = customFieldId;

            CustomFieldOption customFieldOption2 = new CustomFieldOption();

            customFieldOption2.displayName   = "Unapproved";
            customFieldOption2.customFieldId = customFieldId;

            try {
                // Add custom field options.
                CustomFieldOption[] customFieldOptions =
                    customFieldService.createCustomFieldOptions(new CustomFieldOption[] { customFieldOption1,
                                                                                          customFieldOption2 });

                // Display results.
                if (customFieldOptions != null)
                {
                    foreach (CustomFieldOption customFieldOption in customFieldOptions)
                    {
                        Console.WriteLine("Custom field option with ID \"{0}\" and name \"{1}\" was created.",
                                          customFieldOption.id, customFieldOption.displayName);
                    }
                }
                else
                {
                    Console.WriteLine("No custom field options created.");
                }
            } catch (Exception ex) {
                Console.WriteLine("Failed to create custom field options. Exception says \"{0}\"",
                                  ex.Message);
            }
        }