No one of my self-created addins can be added by administration console and the message "Select at least one dll that implements IEdmAddIn5" followed by trying to add .dll that certainly DOES contain that one puts me in the corner. Well, what I know is that native .dll addins installs without problems.
Thank u.
As a first test, comment out all your code inside GetAddinInfo except for any code that fills in the EdmAddinInfo structure. If the add-in loads successfully, uncomment your code a little at a time until it stops loading properly.
Other posts on trhis topic have also suggested:
A. Renaming the offending class
B. Loading any other working add-in, then loading the 'bad' add-in and then removing the working add-in.
It is also helpful to post your operating system, architecture (x86 or x64) and programming language.
Jim S.