How to Initiates an Object without using a new Keyword

Consider the Following Classes

class Greeting // Which will act as Parent Class

    {

        public Greeting()

        { Console.WriteLine("I am in Greeting Class"); }

    }

class bye : Greeting// Child Class of Greeting

    {

        public bye() { Console.WriteLine("I am in Class Bye"); }

    }

class Hello : Greeting// Child Class of Greeting

    {

        public Hello() { Console.WriteLine("I am in Class Hello"); }

    }

Now put these classes refernces in a XML document
 <?xml version="1.0" encoding="utf-8" ?>

<Classes>

  <Class code="100" path="InvokingConstructorsAssembly.ByeClass.bye"></Class>

  <Class code="200" path="InvokingConstructorsAssembly.HelloClass.Hello"></Class>

</Classes>

Here is the Main Code where the classes references are loaded from XML document dynamically.

class Program

    {

        // Dictionary for containing classes refernce loaded from XML

        public static Dictionary<string, string> tranDict;

        static void Main(string[] args)

        {

            XmlDocument doc = new XmlDocument();

            doc.Load(System.IO.Path.Combine(@"D:\Learning\InvokingConstructorsAssembly\InvokingConstructorsAssembly", "Classes.xml"));

            XmlNodeList listClass = doc.DocumentElement.SelectNodes("Class");

            tranDict = new Dictionary<string, string>();

            foreach (XmlNode nodeTran in listClass)

            {

                string tranCode = nodeTran.Attributes["code"].InnerText;

                string className = nodeTran.Attributes["path"].InnerText;

                if (string.IsNullOrEmpty(tranCode) || string.IsNullOrEmpty(className))

 

                    throw new Exception("Code or class name is not given in Classes config file");

                tranDict.Add(tranCode, className);

            }

            GetClass("100");

            GetClass("200");

        }

        public static Greeting GetClass(string Code)

        {

            Assembly assem = Assembly.GetExecutingAssembly();

            Type t = assem.GetType(tranDict[Code]);

            Greeting gret = (Greeting)Activator.CreateInstance(t);

            return gret;

        }

Output

I am in Greetin Class

I am in Class Bye

I am in Greeting Class

I am in Class Hello

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