[REQ] C# - Provide Dependency Injection support

Problem

I need to use the generated Client classes through Dependency Injection, including configuration. To achieve this, I would write something like the below for each client, when configuring the service container and repeat the same few lines for each client.

        builder.Services.Configure<Configuration>(builder.Configuration.GetSection(nameof(Configuration)));
        builder.Services.AddSingleton<WeatherForecastApi>((sp) =>
            new WeatherForecastApi(sp.GetRequiredService<IOptions<Configuration>>().Value));

I would prefer to use a simpler way to configure the client, such as

        builder.AddSingletonApiClient<WeatherForecastApi>();

Solution

I propose to introduce a set of generic extensions as part of the Api directory of the C# client that look like this.

Start by reviewing the generated C# client's Api directory and the dependency-injection extension proposal in the linked gist. Determine how configuration and generated Client classes should be registered, then verify that the proposed helper can configure each client through the service container.