import lib for script operator

[11paf]

What am I doing wrong, I want to access these libraries:
NAudio, Bass, Math.Net, Spectrogramm
I have tried all the options, it does not work for me....
I downloaded the packages, tried all the versions, of course indicated the paths to the dll in the window "custom assembly" c# OP.
The errors are as follows:
could not load file or assembly 'MathNet.Numerics 5.0.0........
System.Object is defined in an assembly that is not referenced..
you must add a reference to 'System.Runtime, Version=5.0.0.0.........
https://drive.google.com/file/d/1nKVrN2c...sp=sharing