Why does Windows Forms pick up errors out of nowhere?

Question

.NET

I wanted to make a simple text editor, as a result I sketched out a form, I didn’t write any code at all, and at startup it knocks out an error, although the ide doesn’t show any errors, I decided that Mb accidentally broke some field settings and decided to delete the form and create a new one, as a result a new form even in ide it doesn’t open, it crashes


after rebooting ide started to knock out a bunch of errors by type:
the predefined type system.object is not defined or imported

and I don’t understand how this can happen at all if the project was created in the same ide, respectively, the path to the library. net could not break in any way

PS I know that there are few details, but that's all I did, it's also VS 2022 .NET 6

Answer 1

I’m starting from 22 current .. but in general, everyone tells you