int.parse

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DemoConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Title = "Int parse";

            string number;

            Console.WriteLine("Enter number");

            number = Console.ReadLine();

            try
            {
                int i = int.Parse(number);
                Console.WriteLine("success");
            }
            catch(Exception ex)
            {
                Console.WriteLine("error");
            }

            Console.ReadLine();
        }
    }
}