There are newer frameworks like MAUI but I believe WPF is the most common for pure Windows development. It's the best mix of modernity and stability. WinUI3 is

There are newer frameworks like MAUI but I believe WPF is the most common for pure Windows development. It's the best mix of modernity and stability. WinUI3 is coming but I don't think it's properly supported yet. There's also Avalonia if you want cross platform (not first party). Someone correct me if I'm wrong, I've been in WinForms land for a while (unfortunately).