AVL.NET is a part of the Aurora Vision Library product. Its AvlNet.dll and AvlNet.TS assemblies are a .NET wrappers for the native AVL library. They contain all the functionality that native AVL library has, including types, functions and environment (hardware) settings.
Getting Started with Aurora Vision Library .NET
Relation between AVL.NET and AVL/C++
HMI Controls for AVL.NET
AVL.NET Performance Tips
Code Migration Guide to version 4.11