Save or read file in binary field is not possible on ODB 2.2.x with C#


we want to save and read binary files in ODB 2.2.x.
If we manually add / save a file in a binary field via ODB Studio, we will not be able to see the file in the properties afterwards. We also can not read via the C # driver with binary protocol.
We use this driver:

Do you have an idea how we can solve this?
Is this perhaps possible in the version ODB 3.x?

Thanks in advance and greetings