NET6 dll in .Net Framework 4.8 project

[Wlad57]

Hi, I have one question regarding compatibility with older frameworks like nf48.

Since the library is written in NET6 (C#10) how can we be sure that it will work correctly in net framework 4.8 (C#7)? Does the compiler downgrade the language at build time or something else?

This is probably a simple question but I couldn't find an answer online :)

[pomianowski]

In .NET this is done in such a way that when building a library, separate DLLs are created for each version. And if you look in the NuGet archive, you'll notice that there is a separate folder for each version.

If any library or functionality is not supported, preprocessor directives are used

• C# preprocessor directives
  https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/preprocessor-directives
• NuGet Support multiple .NET versions
  https://docs.microsoft.com/en-us/nuget/create-packages/supporting-multiple-target-frameworks