**Visual Studio Version**:  **Steps to Reproduce**: 1. Create C# project with the following content: ```xml <Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <OutputType>Exe</OutputType> <TargetFramework>netcoreapp2.1</TargetFramework> </PropertyGroup> <ProjectReference Include="Foo.csproj"/> </Project> ``` 2. When opened in VS it will be unloaded. Reload it. **Expected Behavior**: Error is reported that `ProjectReference` element is misplaced (not inside an `ItemGroup`). **Actual Behavior**:  **User Impact**: