Is the default constructor really necessary for nhibernate to persist an object?

Question

for some reason I don't wanna let user to create an instance of the object, without sending a property to the constructor but as I know the object should have default constructor and so it would be possible to create an instance with out sending requierd property. is there any way to prevent this problem? and if yes does it have any side effect?

Answer 1

Just use a protected default constructor:

public class Product
{
    protected Product() { }

    public Product(Category category)
    {
        this.Category = category;
    }
}