Convert QT / C ++ to C #

This may seem a little ridiculous, but as some of you here may already know, I am converting an application written in C ++ to C #.

I noticed that a lot of code uses references to objects such as "QObject", "QWidget" or "QFrame".

Because of this, I’m not quite sure that I should look for the source for QT and transfer the main structure of this to a bunch of C # classes that essentially imitate the same functionality, or if any kind of structure there that does the same and can be used as a replacement for this.

Also, can someone explain to me what a slide and a slot are, and what can I do to simulate this in C #? I think delegates, but I'm not sure ...