Why does the configuration of .NET Core options not work with a generic type parameter?

Question

I have a .NET Core WebApi project. To read the appsettings in an easy way, I configure the options to be injected with DI. This works fine. However if I try to call Configure<>() with a generic type parameter, I get an error.

Argument 2: cannot convert from 'Microsoft.Extensions.Configuration.IConfigurationSection' to 'System.Action'

The method overloads apart from Configure<T>(Action<T> configureOptions) seem not to be available anymore.

Why does the call not work with generic type parameters?

Startup.cs

public class Startup
{
    public IConfiguration Configuration { get; }

    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public void ConfigureServices(IServiceCollection services)
    {
        // services.AddMvc() etc...

        services.AddOptions();

        // Works fine
        services.Configure<MyOption>(Configuration.GetSection(nameof(MyOption)));
    }

    private void AddOption<T>(IServiceCollection services)
    {
        // Wont work
        services.Configure<T>(Configuration.GetSection(nameof(T)));
        services.Configure<T>(Configuration.GetSection(""));
    }
}

MyOption.cs

public class MyOption
{
    public bool MyProp { get; set; }
}

appsettings.json

{
    "MyOption": {
        "MyProp": true
    }
}

Answer 1

You need to use services.Configure as below:

services.Configure<MyOption>(setting =>
{  
    Configuration.GetSection("MyOption").Bind(setting);  
});