Does .NET Framework 4.8 support .env files for configuration?

Question

I am working on a .NET Framework 4.8 application and want to store configuration values in a .env file instead of using web.config, app.config, or appsettings.json.

• Does .NET Framework 4.8 support .env files natively?
• If yes, how can I configure it to read values from a .env file?
• If not, what alternatives can I use?

I tried using Environment.GetEnvironmentVariable("MY_VARIABLE"), but it only works if I manually set environment variables.

Is there any library or workaround that enables .NET Framework 4.8 to load environment variables from a .env file or can we store environment variables in IIS?