有关泛型和继承的问题

Question

I have a class Derived<T> that is derived from Base<T> . Which of the following assertions are true or false?

typeof(Derived<SomeType>).IsSubclassOf(typeof(Base<SomeType>))
typeof(Derived<>)        .IsSubclassOf(typeof(Base<SomeType>))
typeof(Derived<SomeType>).IsSubclassOf(typeof(Base<>))
typeof(Derived<>)        .IsSubclassOf(typeof(Base<>))

Thanks in advance

Answer 1

In that case, the first one:

typeof(Derived<SomeType>).IsSubclassOf(typeof(Base<SomeType>))

The other's don't compile- you cannot refer to a generic without it's type argument, eg

Something<>