using System;

using System.Reflection;

public class Program

{

    public class position

    {

        public int x { get; set; }

    }

​

    public class window

    {

        public position position { get; set; }

        public window()

        {

            position = new position();

        }

    }

​

    public class WindowManager

    {

        public window window { get; set; }

        public WindowManager()

        {

            window = new window();

        }

    }

​

​

    public static void Main()

    {

        var manager = new WindowManager();

        manager.window.position.x = 42;

        string path = "window.position.x";

​

        var type = typeof(WindowManager);

        PropertyInfo property = null;

        foreach (var prop in path.Split('.'))

        {

            property = type.GetProperty(prop);

            if (property == null)

            {

                // log error

                break;

            }

            type = property.PropertyType;

        }

        Console.WriteLine(property.Name);

    }

}