using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        string strMyValue ="hello";

 // create a new string instance instead of changing the old one

 strMyValue += "How Are";

 strMyValue += "You ??";

        Console.WriteLine(strMyValue);

         StringBuilder sbMyValue = new StringBuilder("");

 sbMyValue.Append("Hello Visitor");

 sbMyValue.Append("How Are You ??");

 string strValue = sbMyValue.ToString();

        Console.WriteLine(strValue);

    }

}