using System;

public class Program

{

    public static void Main()

    {

        //Validation

        //Get Input from a user

        Console.WriteLine("Please enter a whole number.");

        int intNumber;

        string strInput = Console.ReadLine();

​

        //Validate this input (check whether it is a valid whole number)

        bool IsValidNumber = Int32.TryParse(strInput, out intNumber);

        if (!IsValidNumber)

        {

            Console.WriteLine("Please enter a valid number!");

            return;

        }

        else

        {

            Console.WriteLine("Valid whole number is {0}", intNumber);

        }

​

        //Get Input from a user

        Console.WriteLine("Please enter a double.");

        double dblNumber;

        string strInput2 = Console.ReadLine();

​

        //Validate this input (check whether it is a valid fractional number)

        bool IsValidNumber2 = double.TryParse(strInput2, out dblNumber);

        if (IsValidNumber2 == false)

        {

            Console.WriteLine("Please enter a valid double!");

            return;

        }

        else

        {

            Console.WriteLine("Valid double number is {0}", dblNumber);

        }

    }

}