Please note, this is a STATIC archive of website www.w3schools.com from 05 May 2020, cach3.com does not collect or store any user information, there is no "phishing" involved.
Program.cs
 

using System;

namespace MyApplication
{
  class Program
  {
    static void Main(string[] args)
    {
      Console.WriteLine("Enter your age:");
      int age = Convert.ToInt32(Console.ReadLine());
      Console.WriteLine("Your age is: " + age);
    }
  }
}

Result:
Enter your age: