I recently started to work with Visual Studio 2019 (2015 had no problems like this one). I somehow created a primary Windows Form without any bugs. But after I tried to create another Windows Form in the same project (Sol Explorer->Add->New Item->CLR->Windows Form), the header and the cpp file were created, but resx file was not. So the Windows Form designer is missing. It also cannot be accessed from the Solution Explorer menu ('View Designer' is missing).
How to fix the problem? I couldn't find a solution, but some articles mention missing tags in Visual Studio.
That worked for me after several attempts:
Designer and .resx file appeared from nowhere