How to delete an array in c#?

Question

I'm sorry if this is an obvious question but neither Google or a search here led me to an answer.

Is there a way to remove an array entirely?

I want the opposite of int[] array = new int[5]

Answer 1

Say you call:

 void Foo(){
     int[] a = new int[5];
 }

In C# there is no way to undefine the variable a. That means a will be defined in Foo even if you set a to null. However, at the end of Foo a will fall out of scope. That means no code can reference it, and the garbage collector will take care of freeing the memory for you the next time it runs, which might not be for a long time.