如何在自定义 Nuget 包中确定要使用的平台配置？

Question

I have a class that I need to put in a nuget package for internal use. This class needs to access some configuration settings but can potentially be installed in a Framework or Core application, so I don't know if it's a web.config, an app.config or an appsettings.json. Doing web searches for this just turns up articles on how to configure nuget (not how to get a nuget to read from the config files). Can anyone point me in the right direction?

Answer 1

If your package targets both .NET Framework and .NET Core, or .NET Standard 2.0 or earlier, and you want to detect the target runtime when you compile the code, you could use a preprocessor directive in your source code, eg:

#if (NETCOREAPP1_0 || NETCOREAPP1_1 || NETCOREAPP2_0 || NETCOREAPP2_1)
    //.NET Core specific code...
#else
    //other...
#endif