How to instantiate List but T is unknown until runtime?

Question

Assume I have a class that is unknown until runtime. At runtime I get a reference, x, of type Type referencing to Foo.GetType(). Only by using x and List<>, can I create

Answer 1

Type x = typeof(Foo);
Type listType = typeof(List<>).MakeGenericType(x);
object list = Activator.CreateInstance(listType);

Of course you shouldn't expect any type safety here as the resulting list is of type object at compile time. Using List