// Calc.cs
using System;

namespace CalculatorExample
{
    // This class contains the app's entry point.
    class Program
    {
        static void Main()
        {
            Calc c = new Calc();
            int ans = c.Add(10, 84);
            Console.WriteLine("10 + 84 is {0}.", ans);

            // Wait for user to press the Enter key before shutting down.
            Console.ReadLine();  
        }
    }

    // The C# calculator.
    class Calc
    {
        public int Add(int x, int y)
        { return x + y; }
    }
}