//C#
public class Laskuja
{
    /// <example>
    /// <pre name="test">
    ///    Laskuja.Summa(2,3) === 5;
    ///    Laskuja.Summa(-5,5) === 0;
    /// </pre>
    /// </example>     
    public static int Summa(int a, int b)
    {
        return a + b;
    }

    public static void Main()
    {
        System.Console.WriteLine("Summa = " + Summa(2,3));
    }
}