I wanted to try out C# and the MstnPlatformNet API to harvest Item Type instance data. After obtaining help from Jan Šlegr and Paul Connelly on the Programming Forum, I wrote the ItemInstanceCollector Visual Studio project.
The project creates the ItemInstanceCollector DLL. It uses a programmatic approach to obtain an Item Type EcSchema object, and shows how to use that object to harvest Item Type instance data. Our web page describes the project in more detail and lets you download the source code.