Migrating from .NET Core 3.1 to .NET 5 produce compile-time error

Question

I have .netcore 3.1 application and I want to update it to .net 5.0

I have the following code

public static IAppSettings ConfigureAppSettings(this IServiceCollection services, IConfiguration configuration)
{
    void ConfigureSection<Interface, Implementation>(string sectionName)
        where Implementation : Interface, new() where Interface : class
    {
        Implementation configSection = new Implementation();
        configuration.GetSection(sectionName).Bind(configSection);
        services.AddSingleton<Interface>(configSection);
    }
}

it was working previously, but after updating to .net5 I start seeing this compile-time error

CS1061 'IConfigurationSection' does not contain a definition for 'Bind' and no accessible extension method 'Bind' accepting a first argument of type 'IConfigurationSection' could be found (are you missing a using directive or an assembly reference?)

1. Obviously, the Bind method has been removed and the API is no more compatible
   
2. There is no mention for the solution of this problem in the offical documentation for the migration

My question: What is the alternative to the Bind method?

Answer 1

I installed this Microsoft.Extensions.Configuration.Binder package and the problem solved.

The strange thing is that when I was using .net-core3.1 I did not need to install it from Nuget but after updating to .net5 I needed to install this package separately.