High Quality Content by WIKIPEDIA articles! LLBLGen Pro is an O/R mapper and code generator for the Microsoft .NET platform, created by Solutions Design bv. Computer programmers and software architects use this software to create a data-access tier and business objects tier in C# or VB.NET for several O/R mapping frameworks, like NHibernate, Entity Framework, Linq to SQL, and its own framework. Because LLBLGen Pro supports a lot of different databases to work with, software developers can choose the best framework and database per project.