Message in Japanese (日本語)
型 '<var>Type Name</var>' の CustomValidationAttribute メソッド '<var>Method name</var>' は System.ComponentModel.DataAnnotations.ValidationResult を返す必要があります。正常に完了したことを表すには、System.ComponentModel.DataAnnotations.ValidationResult.Success を使用します。
Unlocalized message
The CustomValidationAttribute method '<var>Method name</var>' in type '<var>Type Name</var>' must return System.ComponentModel.DataAnnotations.ValidationResult. Use System.ComponentModel.DataAnnotations.ValidationResult.Success to represent success.
Search by Google