I'm using Microsoft Visual Studio Professional 2019 RC Version 16.0.0 (VisualStudio.16.Release/16.0.0+28729.10) and I'm finding that intermittently when I save a project file the changes to the project file are being undone.
This has proved more than a little confusing as NuGet packages I've added disappear, or updated ones revert to previous versions.
Likewise, if I've included files in the project they will then no longer be included after the save, so it looks like the changes are not getting to the csproj file correctly?
Is anyone else experiencing this and does anyone know why this happens?
This seems to be resolved in 16.1.0 Preview 2.0
来源：https://stackoverflow.com/questions/55500027/saving-project-file-in-visual-studio-2019-reverts-changes-in-the-csproj-file