using System;  

namespace PropertyExample  

{  

    public class Student  

    {      

        private int mMarks = 0;          

        public int Marks  

        {  

            get  

            {  

                if(mMarks >= 80)  

                {  

                    mMarks+=5;  

                }  

                else if(mMarks <= 79 && mMarks>=70 )  

                {  

                    mMarks+=2;                          

                }                     

                return mMarks;  

            }  

            set  

            {  

                mMarks = value;  

            }  

        }  

    }  

​

public class Program  

    {  

       public static void Main(string[] args)  

        {  

            Student objStudent = new Student();  

            Console.WriteLine("Please enter your marks");  

            objStudent.Marks = Convert.ToInt32(Console.ReadLine());  

            Console.WriteLine("Your marks are :{0} marks", objStudent.Marks);  

        }  

    }  

}