Why Duplicate "..TargetFrameworkAttribute" c# assemblies created code example

Example: Why Duplicate "..TargetFrameworkAttribute" c# assemblies created

<PropertyGroup>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
    <GenerateTargetFrameworkAttribute>false</GenerateTargetFrameworkAttribute>
  </PropertyGroup>