This Git repo includes two projects: an AVR Classic version and an AVR for .NET version of a simple program to demonstrate Open Query File. By comparing these two programs you can learn a little about the differences between to the two development environments.
Use the green "Clone or download" button above to download a zip with both projects.
See the annotated AVR Classic 5.0 version.
See the annotated AVR for .NET 14.0 (use with Visual Studio 2015) version.