using System;

​

public class Program

{

    public static void Main()

    {

        double num1 = 0;

        int num2 = 0;

​

        if(num1.GetType() == typeof(double)) 

        {

            Console.WriteLine("num1 is a double");

        }

        else

        {

            Console.WriteLine("num1 is not a double, it is a " + num1.GetType().FullName);  

        }

​

        if(num2.GetType() == typeof(double)) 

        {

            Console.WriteLine("num2 is a double");

        }

        else

        {

            Console.WriteLine("num2 is not a double, it is a " + num2.GetType().FullName);  

        }

​

    }

}