In the AutoCAD
drawing database there are dictionaries. A dictionary is a type of container
that only contains data or other dictionaries that contain the data. These
are non-graphical objects that are derived from dbObject, Dictionaries do not contain objects that are derived
from DbEntity. Each item in a dictionary will have a key that will allow you
to find out if a particular item already exists in that dictionary. You use the GetAt method or item property
for this. |