How to configure own nuget package in Startup.cs

Question

I'm creating my own Nuget package and for it work properly I need some configuration that own user that installed my package will set.

I noticed that some packages are configured in Startup.cs mostly in Configure and ConfigureServices methods.

An exaple is Swagger package:

In the image above, is configured the api docs name in a swagger configuration. I need something like that. In one of my classes inside my package, it will need information setted by the user in Startup file.

Answer 1

The methods you see in startup are simply extensions on IServiceCollection (for services in ConfigureServices ) or IApplicationBuilder (for app in Configure ). In other words, you'd simply create something like:

public static class IServiceCollectionExtensions
{
    public static IServiceCollection ConfigureMyStuff(this IServiceCollection services, string someParam, string someOtherParam)
    {
        // do stuff

        return services;
    }
}

Then in Startup , the user will be able to do:

services.ConfigureMyStuff("some value for param", "some value for other param");