How do I add custom options to a product like you can in the backend, using the API.
Im using C# but if you know how do to this in Php, that would be helpful too.
I noticed that product has this:
var product = new catalogProductCreateEntity();
product.options_container = "blah";
And there is this:
catalogAttributeOptionEntity optionEntity = new catalogAttributeOptionEntity();
optionEntity.value = "sds";
optionEntity.label = "ere";
But I cant see a way of utilizing them, im not sure how to make a container, and the catalogAttributeOptionEntity does not have all the properties needed to make a custom option.