using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Questions");

        //6. What is the difference between Interface and Abstract Class?

​

        //9. What is the difference between constant and read only in c#?

​

        //11. Can “this” be used within a static method?

​

        //13. What is extension method in c# and how to use them?

​

        //15. What is the difference between string and StringBuilder in c#?

​

        //17. What is sealed class in c#?

​

        //41. What you understand by Value types and Reference types in C#.Net?

    }

}