how to get value from appsettings.json

Question

public class Bar
{
    public static readonly string Foo = ConfigurationManager.AppSettings[\"Foo\"];
}

In the .NET Framework 4.x, I can use the

Answer 1

define your class as

public class MyClass{
   private readonly IConfiguration _configuration;
   public MyClass(IConfiguration configuration)
        {
            _configuration = configuration;
        }
   public void myFunction(){
       var value= _configuration.GetValue("xxx");
}
}

when you call it from anywhere else

IConfiguration config = new ConfigurationBuilder()
                    .AddJsonFile("appsettings.json", optional: false, reloadOnChange: false).Build();
MyClass myclass = new MyClass(config)