public static void Main()
Console.WriteLine("First number ") ;
string sNumber1 = Console.ReadLine ();
int Number1 = int.Parse(sNumber1) ;
Console.WriteLine("Second number ") ;
string sNumber2= Console.ReadLine ();
int Number2 = int.Parse(sNumber2) ;
int Answer = Number1 + Number2;
Console.Write("By addition the sum equals: " + Answer);
int Answer2 = Number1 - Number2;
Console.Write("By subtraction the sum equals: " + Answer2);
int Answer3 = Number1 * Number2;
Console.Write("By multiplication the sum equals: " + Answer3);
int Answer4 = Number1 / Number2;
Console.Write("By division the sum equals " + Answer4);