问题
I'm having a problem with the windows form application . When I create the windows form application , it displays the source code for the form but not the designer layout
回答1:
To enable the designer, download and install the Windows Forms .NET Core Designer VSIX package.
See article: https://devblogs.microsoft.com/dotnet/introducing-net-core-windows-forms-designer-preview-1/
来源：https://stackoverflow.com/questions/58380472/visual-studio-2019-windows-forms-designer