使用可选参数、命名参数简化构造函数链技术(只能在.NET4下运行)

namespace SimpleClassExample
{
    #region Using optional args
    class Motorcycle
    {
        public int driverIntensity;
        public string driverName;

        #region Single constructor using optional args    
        public Motorcycle(int intensity = 0, string name = "")
        {
            if (intensity > 10)
            {
                intensity = 10;
            }
            driverIntensity = intensity;
            driverName = name;
        }
        #endregion
    }

    #endregion

}

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static void Main(string[] args)
 {
            // driverName = "", driverIntensity = 0  
            Motorcycle m1 = new Motorcycle();
            Console.WriteLine("Name= {0}, Intensity= {1}", m1.driverName, m1.driverIntensity);

            // driverName = "Tiny", driverIntensity = 0 
            Motorcycle m2 = new Motorcycle(name:"Tiny");
            Console.WriteLine("Name= {0}, Intensity= {1}", m2.driverName, m2.driverIntensity);

            // driverName = "", driverIntensity = 7  
            Motorcycle m3 = new Motorcycle(7);
            Console.WriteLine("Name= {0}, Intensity= {1}", m3.driverName, m3.driverIntensity);
}