/// <summary>
 /// Adds an error to the pages error collection.
 /// </summary>
 /// <param name="message">The message.</param>
 /// <param name="validationGroup">The validation group.</param>
 /// <param name="page">The page.</param>
 public static void AddError(string message, string validationGroup, Page page)
 {
     ErrorSummaryValidator error = new ErrorSummaryValidator(message);
     error.ValidationGroup = validationGroup;
     page.Validators.Add(error);
 }
 /// <summary>
 /// Adds an error to the pages error collection.
 /// </summary>
 /// <param name="message">The message.</param>
 /// <param name="page">The page.</param>
 public static void AddError(string message, Page page)
 {
     ErrorSummaryValidator error = new ErrorSummaryValidator(message);
     page.Validators.Add(error);
 }