public override void RegisterServices(IServiceRegister register)
{
register.Singleton <TestSchema>();
register.Singleton <DIGraphType <SampleGraph, SampleSource> >();
register.Scoped <Service1>();
register.Scoped <Service2>();
// note: in this example, SampleGraph is not registered, but is created for every field resolver (except static methods) -- see DIGraphType.MemberInstanceFunc
}
