I just installed VS2019 and can't figure out why most of the Toolbox components are disabled, only 'All Windows Forms' can be used. <img src="https://i.stack.imgur.com/H06p7.png" alt="enter image description here"> I installed .NET Framework 4.8, but it still doesn't work. <img src="https://i.gyazo.com/99dba9657c93bb4924d7687b850ed40b.png" alt="enter image description here">

According to https://devblogs.microsoft.com/dotnet/introducing-net-core-windows-forms-designer-preview-1/ <ul> <li>Container </li> <li>Resources</li> <li>Component Tray</li> <li>In-place editing</li> <li>Designer Actions</li> <li>Databinding</li> <li>User Controls/Inherited Controls</li> </ul> are not supported in the .Net Core 3.0 Designer yet You have to use the .Net Framework (newest Version is 4.7.2) until these things get added to .Net Core