Question

I have this piece of code, and error is generated, just because I haved added into a constructor for its class.

class NestedClass
{
   class A
   {
      A() {}
   }

   class B
   {
       // no constructor
   }

   public static void run()
   {
     A a = new A();  // error
     B b = new B(); // no error
   }
}

And error is:

NestedExample.A is inaccessible due to protection level

Please help me explain this.

Thanks 🙂

Answer 1

Define your constructor as public

public A() { }

Your constructor for class A is private

Private Constructors (C# Programming Guide) – MSDN

Note that if you don’t use an access modifier with the constructor it
will still be private by default.

---

The reason it is working for B is that you haven’t specified any constructor and for default constructor:

Constructor – MSDN

Unless the class is static, classes without constructors are given a
public default constructor by the C# compiler in order to enable class instantiation