using System;

public class Program

{

    public static int PrimeNumber(int n)

        {

            for (int i = 2; i < n; i++)

            {

                if (n % i == 0) { n++; i = 2; }

            }

            return n;

        }

​

    public static void Main()

    {

                    Console.WriteLine("Enter the input number");

            int number = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Original number: " + number);

            Console.WriteLine("Next prime number/Current prime number: " + PrimeNumber(number));

            Console.ReadLine();

​

    }

}