Visual Studio creates empty TargetFrameworkProfile in csproj when changing .NET versions

Question

I'm using Visual Studio 2019. When I change the .NET Framework version of a project, either upgrading or downgrading, Visual Studio automatically creates this in the XML of the csproj file:

<TargetFrameworkProfile />

What does this mean? Does it do anything? If I erase it, the project still runs fine as far as I can tell. Why does Visual Studio create this?

Answer 1

This setting is only applies to portable class libraries (Cross-platform).

Portable class libraries - https://learn.microsoft.com/en-us/previous-versions/dotnet/framework/cross-platform/portable-class-library