protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
if (value == null)
{
return(ValidationResult.Success);
}
if (value.GetType() != typeof(DateTimeOffset))
{
throw new ArgumentException("IdPatternAttribute can only be applied to DateTimeOffset properties");
}
if (Instant.IsValidValue(value as string))
{
return(ValidationResult.Success);
}
else
{
return(DotNetAttributeValidation.BuildResult(validationContext, "{0} is not a correctly formatted Instant", value as string));
}
}