XPO

XPO (eXpress Persistent Objects) is a mature ORM library provided by Developer Express for .NET developers. It serves as a bridge between object-oriented code and relational databases, automating the mapping process and reducing the boilerplate code typically required for data access. XPO is particularly well-regarded for its ability to handle complex object models and its robust schema generation capabilities, which can automatically synchronize database structures with code changes. It supports a wide range of database providers, making it a flexible choice for developers working in diverse environments. While it is a powerful tool for data persistence, it is best suited for developers already working within the .NET ecosystem who need a reliable, high-performance ORM. The library is available as part of the DevExpress subscription model, though the core ORM library is often provided free of charge to the developer community. Users should note that while it simplifies data access, mastering its advanced features like custom criteria and complex object relationships may require a learning curve.