CSharp mimicking JavaScript design pattern

Simplest C# code so far I can think of equivalent to the JavaScript design pattern to allow private members.

The original JavaScript code can be found here:

http://www.crockford.com/javascript/private.html

For the ease of comparison, the JavaScript code from the above link is also pasted here,

 1 function Container(param) {

 2 

 3     function dec() {

 4         if (secret > 0) {

 5             secret -= 1;

 6             return true;

 7         } else {

 8             return false;

 9         }

10     }

11 

12     this.member = param;

13     var secret = 3;

14     var that = this;

15 

16     this.service = function () {

17         return dec() ? that.member : null;

18     };

19 }

Following is the equivalent C# code,

class Program

{

    class Container

    {

        // delegates

        delegate bool JsPrivateDelegate();

        public delegate dynamic ServiceDelegate();



        // constructor

        public Container(dynamic param)

        {

            var secret = 3;

            JsPrivateDelegate dec = delegate()

                {

                    if (secret <= 0) return false;

                    secret--;

                    return true;

                };

            Member = param;

            Service = () => dec() ? Member : null;

        }



        public dynamic Member { get; private set; } // public property

        public ServiceDelegate Service { get; private set; }    // public 'method'

    }

    

    static void Main(string[] args)

    {

        var c = new Container("haha");

        dynamic s;

        do

        {

            s = c.Service();    // consumes the service

            Console.WriteLine("{0}", s ?? "<null>");

        } while (s != null);

    }

}

Note the main point is make private members local variables as long as possible since they are accessible from the closure which C# fully supports. However as a strong-typed language, C# can't get rid of the delegate definition and the local variable definition needs to be in order within a method ('secret' has to come before 'dec').