WCF入门教程（二）

二、实现WCF服务协定（任务二）
   1、创建一个新 CalculatorService 类，该类从用户定义的 ICalculator 接口继承而来并实现该接口定义的协定功能。  
   public class CalculatorService : ICalculator
  
   2、实现每个算术运算符的功能。
   

public double Add(double n1, double n2)
{
    double result = n1 + n2;
    Console.WriteLine("Received Add({0},{1})", n1, n2);
    // Code added to write output to the console window.
    Console.WriteLine("Return: {0}", result);
    return result;
}

public double Subtract(double n1, double n2)
{
    double result = n1 - n2;
    Console.WriteLine("Received Subtract({0},{1})", n1, n2);
    Console.WriteLine("Return: {0}", result);
    return result;
}

public double Multiply(double n1, double n2)
{
    double result = n1 * n2;
    Console.WriteLine("Received Multiply({0},{1})", n1, n2);
    Console.WriteLine("Return: {0}", result);
    return result;
}

public double Divide(double n1, double n2)
{
    double result = n1 / n2;
    Console.WriteLine("Received Divide({0},{1})", n1, n2);
    Console.WriteLine("Return: {0}", result);
    return result;
}
 
   在创建和实现了服务协定后，下一步是运行该服务。 运行服务由三个步骤组成：配置、承载和打开服务。