/// <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.v201211.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);
              }
        }
 public CustomFieldOption updateCustomFieldOption(CustomFieldOption customFieldOption)
 {
     object[] results = this.Invoke("updateCustomFieldOption", new object[] { customFieldOption });
       return ((CustomFieldOption) (results[0]));
 }