Failed attempt to register all DBSets

AutofacModule.cs

   public class AutofacModule:Module
    {
        private static readonly object[] NoParameters = new object[] { };

        protected override void Load(ContainerBuilder builder)
        {
            var dbsetType = typeof(DbSet<>);
            var registerMethod = new Func<ContainerBuilder, Func<IComponentContext, object>, IRegistrationBuilder<object, SimpleActivatorData, SingleRegistrationStyle>>(Af.RegistrationExtensions.Register<object>)
                .Method.GetGenericMethodDefinition();
            foreach (var property in typeof(ApplicationDbContext).GetProperties())
            {
                var getMethod = property.GetMethod;
                var returnType = getMethod.ReturnType;
                if (!returnType.IsGenericType || returnType.GetGenericTypeDefinition() != dbsetType)
                {
                    continue;
                }

                // When this gets called, getMethod is null :?
                T getCaller<T>(IComponentContext c) => (T)getMethod.Invoke(c.Resolve<ApplicationDbContext>(), parameters: NoParameters);

                var factory = new Func<IComponentContext, object>(getCaller<object>).Method.GetGenericMethodDefinition();
                var genericMethod = factory.MakeGenericMethod(returnType);
                var theDelegate = Delegate.CreateDelegate(Expression.GetDelegateType(new[] { typeof(IComponentContext), returnType }), null, genericMethod);
                var registered = (IRegistrationBuilder<object, SimpleActivatorData, SingleRegistrationStyle>)registerMethod.MakeGenericMethod(returnType).Invoke(null, new object[] { builder, theDelegate });

                // As<IDbSet<entity>()
                var entityType = returnType.GenericTypeArguments[0];
                var iDbSetType = typeof(IDbSet<>).MakeGenericType(entityType);
                registered.As(iDbSetType);
            }
        }
    }
}