NHibernate.MappingException: No persister for: Sample.Product

After creating a new mapping file using the code mapping feature in NHibernate, it didn’t work when I tried to persist an instance of the object. Instead I got the following error message:

NHibernate.MappingException: No persister for: Sample.Product

Here is the mapping file I’m using:

	class ProductMapping: ClassMapping<Product>
	{
	public ProductMapping()
	{
	Table("Product");
	Property(x => x.Description);
	Property(x => x.Category);
	Property(x => x.Price);
	}
	}

view raw ProductMappingWrong.cs hosted with ❤ by GitHub

Do you notice what’s wrong? ….

I forgot to make my mapping class public:

public class ProductMapping: ClassMapping<Product>