BLL.Image.ValidateImage C# (CSharp) Method

        public static Models.ValidationResult ValidateImage(Models.Image image, bool isNewImage)
        {
            var validationResult = new Models.ValidationResult();

            if (string.IsNullOrEmpty(image.Name) || !image.Name.All(c => char.IsLetterOrDigit(c) || c == '_' || c == '-'))
            {
                validationResult.IsValid = false;
                validationResult.Message = "Image Name Is Not Valid";
                return validationResult;
            }

            if (isNewImage)
            {
                using (var uow = new DAL.UnitOfWork())
                {
                    if (uow.ImageRepository.Exists(h => h.Name == image.Name))
                    {
                        validationResult.IsValid = false;
                        validationResult.Message = "This Image Already Exists";
                        return validationResult;
                    }
                }
            }
            else
            {
                using (var uow = new DAL.UnitOfWork())
                {
                    var originalImage = uow.ImageRepository.GetById(image.Id);
                    if (originalImage.Name != image.Name)
                    {
                        if (uow.ImageRepository.Exists(h => h.Name == image.Name))
                        {
                            validationResult.IsValid = false;
                            validationResult.Message = "This Image Already Exists";
                            return validationResult;
                        }
                    }
                }
            }

            return validationResult;
        }