Hello,
The 'ANT Managed Library' in C# is slightly different than ANT_DLL in terms of using it such as how to handle ANT device responses and channel events. However, both these libraries share the same basis for connecting to ANT devices and handling events and responses.
There are demos and source code available for both libraries in 'ANT Windows Library Package'. You can download the package from ANT+ Adopter Zone under ANT Software Tools.
It is recommended for ANT developers to use this package as it provides good examples on how to use the different ANT libraries; ANT_DLL and ANT Managed Library.