Updated MVS, the project is built with the library, how to fix it?

Question

C++ / C#

Updated from mvs2010 to mvs2019
The usual wine forms project is assembled into a dll and next to it is a strange exe file weighing 100+ kb, what is it and how to return the assembly to 1 executable file without libraries?
I understand this because of the net core of something there

Answer 1

Build .net framework assembly, not .net core

Answer 2

1. Show csproj
2. dotnet publish -c Release -r win-x64 -f net5.0
3. It’s worth showing which files are next to it

Answer 3

Guys, the issue was resolved by a banal reinstallation of the studio. Looks like it's just a bug