Question

Let’s say I have a non-static, class with 2 levels of nested classes inside.

public class A
{
     public class B
     {
         public class C{}
     }
}

How instances are created when I want to create:

• a) an instance of the master level class (new A())?
• b) an instance of the deepest level class (new C())?

What are performance and memory issues possible with such implementation?

Thanks!

Answer 1

Unlike Java, a nested class in the CLR has no special properties that make it behave different from a class declared at namespace scope. Layout and allocation behavior is identical. It only affects scope. The only advantage of nesting a class is that you can make it private.