protected virtual void RegisterContributors(IDependencyResolver resolver)
{
PipelineContributorTypes.ForEach(
x => resolver.AddDependency(typeof(IPipelineContributor), x, DependencyLifetime.Singleton));
}
public void AddPipelineContributor <T>() where T : IPipelineContributor
{
PipelineContributorTypes.Add(typeof(T));
}