constructor not working

Im quite new to c# and working on my first project.

What Im trying to do is create a mass of objects in my case a load of directories, eventually I want to process the files in the directory, but at the moment concentrating on getting the framework working.

So what I have so far is:-

    class directory
    {
        public directory(String directory, ref worker worker)
        {
            if (worker.canIrun())
            {
                worker.runNew("x:\newDirectory");
            }
        }
    }

    class worker
    {
        public worker(String directory)
        {
            this.runNew(directory);
        }
        public void runNew(String directory)
        {
            directory newDirectory = new directory(directory, this);
        }
        public Boolean canIrun()
        {
            return true;
        }
    }

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So to call this in my main program, I want to be able to run something like:-

worker newWorker = new worker("c:\\firstDirectory\\);

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However I keep getting advised that my constructor doesnt accept my parameters.

What am I doing wrong????