Autofac NotAssignableTo extension

readme.md

Can be used for issue with AutoFac where assembly scanning is used, and IStartables are ran twice:

builder.RegisterAssemblyTypes(GetType().Assembly)
	.InNamespaceOf<SettingsProvider>()
	.NotAssignableTo<IStartable>()
	.AsImplementedInterfaces();

builder.RegisterAssemblyTypes(GetType().Assembly)
	.InNamespaceOf<SettingsProvider>()
	.AssignableTo<IStartable>()
	.AsImplementedInterfaces()
	.SingleInstance();

RegistrationBuilderExtensions.cs

public static class RegistrationBuilderExtensions
{
	public static IRegistrationBuilder<object, ScanningActivatorData, DynamicRegistrationStyle> NotAssignableTo<T>(this IRegistrationBuilder<object, ScanningActivatorData, DynamicRegistrationStyle> registration)
	{
		return registration.NotAssignableTo(typeof(T));
	}

	public static IRegistrationBuilder<TLimit, TScanningActivatorData, TRegistrationStyle> NotAssignableTo<TLimit, TScanningActivatorData, TRegistrationStyle>(this IRegistrationBuilder<TLimit, TScanningActivatorData, TRegistrationStyle>
registration, Type type) where TScanningActivatorData : ScanningActivatorData
	{
		if (registration == null)
			throw new ArgumentNullException(nameof(registration));
		registration.ActivatorData.Filters.Add(t => !type.GetTypeInfo().IsAssignableFrom(t.GetTypeInfo()));
		return registration;
	}
}