Why is interface variable instantiation possible?

Question

As far as I know, interfaces cannot be instantiated.

If this is true, why does the below code compile and execute? It allows you to create a variable interface. Why is this possible?

Interface:

public interface IDynamicCode<out TCodeOut>
{        
    object DynamicClassInstance { get; set; }
    TCodeOut Execute(string value = "");
}

InCode:

var x = new IDynamicCode<string>[10];

Result:

UPDATE:

It only happens when array declared. Not a single instance.

Answer 1

You're not instantiating an interface, but an array of that interface.

You can assign an instance of any class that implements IDynamicCode<string> to that array. Say you have public class Foo : IDynamicCode<string> { }, you can instantiate that and assign it to an element of that array:

var x = new IDynamicCode<string>[10];
x[5] = new Foo();

Instantiating the interface would not compile:

var bar = new IDynamicCode<string>();