What's the magic of arrays in C#

Question

int[] a = new int[5];
string[] b = new string[1];

The types of both a and b inherit from the abstract System.Array<

Answer 1

There is such class. You cannot inherit it, but when you write "int[]" the compiler creates a type that inherits System.Array. So if you declare a variable:

int[] x;

This variable will have a type that inherits System.Array, and therefore has all its methods and properties.

This is also similar to delegates. When you define a delegate:

delegate void Foo(int x);
delegate int Bar(double x);

Then the type Foo is actually a class that inherits System.MulticastDelegate and Bar is a class that inherits System.Delegate.