I have a solution with Service Fabric .sfproj project that works well in Visual Studio 2017.
Visual Studio 2019 can't open it. Seems that .sfproj project is unsupported at that moment.
Tried without success to create an empty Service Fabric project in VS 2017 and then open it in VS 2019.
Microsoft Service Fabric installation guide has nothing for Visual Studio 2019: https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-get-started
Any thoughts?