When I create a new Windows Desktop Form Application using .NET Core with the latest Visual Studio 2019 Community Edition update, I cannot view the design view of the form, i.e., Form1.cs[Design]. When I click on the appropriately labeled Form1.cs file, it only opens up the code view.
Edit: At the time the question was asked Microsoft hadn't released the visual designer for WinForms in .NET Core in Visual Studio 2019. It needed a separate preview install. By May 2020, Visual Studio version 16.6, the designer was still in preview but could be enabled from Tools/Options/Environment/Preview Features/'Use the preview Window Forms designer for .NET Core apps' without needing an install.
As of November 2020 the designer is still in preview, but is enabled by default in projects in Visual Studio 2019 version 16.8 and later. It's still not complete, particularly re data binding, but the number of issues is much smaller. It can now be disabled via the Tools/Options menu as discussed above.
