Registers the PdfEngine singleton and its PdfOptions, configured by configure.
public static IServiceCollection AddBroadside(this IServiceCollection services, Action<PdfOptions> configure)
The service collection.
Sets the options fluently, as on the static entry point, for instance options => options.UseStrict(). Calling
AddBroadside again registers no second engine; it adds its delegate, which runs after this one.
services, for chaining.