Does T[] implement IList<T>? [duplicate]

Question

I have a class constructor that takes a IList<IElement> as an argument.

When creating a new instance of the class I'm able to pass a IElement[] instead of the IList<IElement> how is that posible?

Answer 1

An array with element type T derives from IList<T>.

This is not visible in the meta-data in mscorlib.dll, but the inheritance relationship is created at runtime in the CLR. C# and the CLR are aware of the array type and treat it specially.