Create a factorial program that reports illegal Factorial() arguments using an Exception using C# dotnet

 class Factorial3  
   {  
     public static int Factorial(int value)  
     {  
       if (value < 0)  
       {  
         string s = String.Format("Illegal negative argument to Factorial {0}", value);  
         throw new ArgumentException(s);  
       }  
       int factorial = 1;  
       do  
       {  
         factorial *= value;  
       } while (--value > 1);  
       return factorial;  
     }  
   }  
   public class Program2  
   {  
     public static void Main(string[] args)  
     {  
       try  
       {  
         for (int i = 6; i > -6; i--)  
         {  
           int factorial = Factorial3.Factorial(i);  
           Console.WriteLine("i = {0}, factorial = {1}", i, factorial);  
         }  
       }  
       catch (ArgumentException e)  
       {  
         Console.WriteLine("Fatal error:");  
         Console.WriteLine(e.ToString());  
       }  
       Console.ReadLine();  
     }  
   }