How to make your own bootloader[Launcher]?

Question

visual studio

Hello, could you please tell me a lesson where you can make a launcher loader, for example, I downloaded it and installed it and it offers me to download something of some version, the program update is also checked and the version of the application may already be outdated, for example, I place files somewhere on the server and transfer them via torrent, the launcher should find and download the torrent and download it to a specific folder with the launcher after downloading, it will appear to run, I’m still zero in this business and just started learning, looking for it on the internet, I didn’t find what I needed (