using System;

public class Program

{

        public static void Main(string[] args)

        {

            for (var i = 0; i < 5; i++)

            {

                try

                {

                   InnerVoid(i);   

                }

                catch (Exception e)

                {

                    Console.WriteLine($"{i} threw an error: {e.Message}");

                }

            }

        }

        public static void InnerVoid(int i)

        {

            decimal? x;

           try

           {

               x = 1M * i/(i-1);

           }

           finally

          {

          }

          if (x.HasValue)

             Console.WriteLine($"iteration {i} calculated {x}");

          else

             Console.WriteLine($"x is null");

        }

}