After upgrading a project from 2019.3.11f1 to 2019.3.12f1 I'm getting build errors in Visual Studio. Code builds fine with 2019.3.11f1. To reproduce: 1. Create a new "High Definition RP" project from Unity Hub (2.3.1). 2. Once Unity has loaded, from the menu select Assets -> Open C# Project. 3. In Visual Studio, from the menu select Build -> Build Solution. I get several of these errors: Severity Code Description Project File Line Suppression State Error CS0246 The type or namespace name 'Readme' could not be found (are you missing a using directive or an assembly reference?) Assembly-CSharp-Editor E:\Unity Projects\Test 2019.3.12f1 HDRP\Assets\TutorialInfo\Scripts\Editor\ReadmeEditor.cs 9 Active Do the same with 2019.3.11f1 and it works just fine. Anyone else getting similar issues? Unity will still build and run ok - just seems Visual Studio can't figure things out. Looks like it's only having issues with "xxx-Editor" projects in the solution. Using Visual Studio Community 2019 (16.5.4).