With the middle-tier generated, all you have to do for most part is to write one line of code to do a CRUD operation such as delete a record, get the total number of records, get a certain amount of records and more. To make it even easier, code examples are also generated for each of this operation so all you have to do is copy and paste. The business layer is the tier called by the presentation tier, or any client you choose to make this shareable library available to within your company.