.net api manuals

SUGGESTED

I must be missing something.  I am trying to find a manual that describes all the factories or methods that .net api has and how they work.  I looked in my documentation folder in the sdk directory and all I have is a quick start for .net.  My COM documentation directory has quite a few helpful documents but only the one in .net.    anyone know where I can get a list of the factories methods. 

thanks

jeff

PS using 2018 sdk and sage 50 2018