Assembly.Load() or Not?

Question

we have a very old windows program which developed with c# and with every new publishment the customers need to reinstall the program's new version. I wonder that if it's possible.

1. I will store all classes into txt files
2. When program starts to run, my dispatcher class will search for related txt file and it will create the form/class with Assembly.Load on the fly.
3. Let's assume if I change something in X form, I will only revise the text file related to X form and overwrite it.

Is this possible?