protected override void ValidateElement(object element)
{
Monitor.Enter(_syncRoot);
try
{
if (element == null)
{
if (AllowNull)
{
return;
}
throw new ValidationMetadataException("Value cannot be null");
}
TypeNameInfo typeName = TypeNameInfo.AsTypeNameInfo(element);
if (string.IsNullOrWhiteSpace(typeName.FullName))
{
if (AllowEmpty)
{
return;
}
throw new ValidationMetadataException("Value cannot be empty");
}
if (!TypeNameInfo.IsValidLanguageIndependentFullName(typeName.TypeReference))
{
throw new ValidationMetadataException("Invalid language-independent identifier");
}
}
finally { Monitor.Exit(_syncRoot); }
}
