using System;

​

public class Student

{

    private int stdID;

    public int StdID

    {

        get

        {

            return stdID;

        }

​

        set

        {

            if (stdID < 1)

            {

                throw new Exception("student ID should be greater then 0");

            }

            else

            {

                stdID = value;

            }

        }

    }

}

​

public class Program

{

    public static void Main()

    {

        Student Aneesh = new Student();

        Aneesh.StdID = 25;

        Console.WriteLine(Aneesh.StdID);

    }

}