Hello, for using UWP/WinRT libraries in Unity apps, one must put them under ENABLE_WINMD_SUPPORT define in scripts: https://docs.unity3d.com/Manual/windowsstore-scripts.html However, this define greys out these code parts in the editor and disables functions like auto-complete or auto-formatting. Up until now, I solved this by generating the solution with Unity, opening it with Visual Studio and editing the code parts there, as they are not greyed out anymore, as described here: https://forums.hololens.com/discussion/10126/autocompletion-for-uwp-libraries-in-unity I recently upgraded my project to Unity 2019.3, and now with the IL2CPP scripting backend, the generated solution does not contain my .cs files anymore and I can't edit them in this way. I found this post describing the same problem: https://forum.unity.com/threads/how...support-code-efficiently.677911/#post-4537591 but same as the OP, I can't find my C# scripts in the solution, all I find are C/C++ scripts. I'm using Visual Studio Community 2019 and have the Visual Studio Tools for Unity component added to my installation. Is there any way to have functions like autocompletion for UWP libraries in Unity 2019.x? Thanks!