How to edit dll?

Question

.NET

There is a good library for working with mail. But the free version gives a window every 10 minutes that you need to buy it. How can I view the dll code and edit it? Accordingly, so that it works later. The library is written in C#.

Answer 1

Well, they won't let you edit the dll. It needs to be rebuilt. And for decompiling and viewing the code, there is this

Answer 2

ILSpy