MVC, MVP for WinForms. Whether it is necessary?

Question

C++ / C#

Greetings.
Question from a series of philosophical. I am making my application similar to "GALAXY ERP" Accounting for clothing items ( ftp://217.15.187.42/pub/documentation/810/810_22_0... It's all in C # and WinForms. I write the application alone and I will support it alone. Never I didn't use MVC and MVP patterns, hence the question: is it necessary or let it be so?
Thank you.

Answer 1

Necessary