Getting the Name of All Nodes Installed

Hello I tried to get some results with this python script, I tried all the DLL files stored in my computer and I only got results outputs with Autodesk Refinery, but I read many thing that I am not sure what they are, not only command names.

# Enable Python support and load DesignScript library
import sys
import clr
clr.AddReference(‘ProtoGeometry’)
from Autodesk.DesignScript.Geometry import *

sys.path.append(r’C:\Program Files (x86)\IronPython 2.7\Lib’)
import ctypes

clr.AddReference(‘System.Reflection’)
from System import Reflection

X = Reflection.Assembly
# The inputs to this node will be stored as a list in the IN variables.
A = X.LoadFrom(“C:\Program Files\Autodesk\Refinery\RestDynamoCore\DynamoCore.dll”)

# Place your code below this line

# Assign your output to the OUT variable.
OUT = A.GetTypes()