Recently, the company established a three-tier project framework of C# winform. I'll sort out my logical thinking first, but I still don't understand it after reading it for a long time. Why?

How to implement it? Set the startup item, and F5 will execute it.

The clearer the hierarchy, the easier it is to understand, and it will be annoying if they are all piled together.

I suggest you look at it according to the functional module. Repeat a line to understand the meaning of some code in the project. If all the functions are understood, you can understand the whole project.

Don't look at a pile of code, it's not difficult to find a breakthrough.

If you don't understand the business, you can start with the data layer to understand the entity attributes and dependencies of each table, which is very helpful for you to grasp the project.