【C#笔记】构造函数实现及其调用顺序

namespace TeseApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            MyClass2 my = new MyClass2(3, 4);
            Console.ReadLine();
        }
    }

    public class MyClass
    {
        public MyClass()
        {
            Console.WriteLine("MyClass:默认构造函数");
        }
        public MyClass(int a, int b)
        {
            Console.WriteLine("MyClass带参构造:a={0}, b={1}.", a, b);
        }
    }

    public class MyClass2 : MyClass
    {
        public MyClass2()
        {
            Console.WriteLine("MyClass2:默认构造函数");
        }
        public MyClass2(int a, int b)
        {
            Console.WriteLine("MyClass2带参构造:a={0}, b={1}.", a, b);
        }
    }
}

故构造顺序为：父类默认构造 =>子类具体构造

那如果我们想实现父类的具体构造，可以采用以下的写法

namespace TeseApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            MyClass2 my = new MyClass2(3, 4);
            Console.ReadLine();
        }
    }

    public class MyClass
    {
        public MyClass()
        {
            Console.WriteLine("MyClass:默认构造函数");
        }
        public MyClass(int a, int b)
        {
            Console.WriteLine("MyClass带参构造:a={0}, b={1}.", a, b);
        }
    }

    public class MyClass2 : MyClass
    {
        public MyClass2()
        {
            Console.WriteLine("MyClass2:默认构造函数");
        }
        public MyClass2(int a, int b) : base(a, b)
        {
            Console.WriteLine("MyClass2带参构造:a={0}, b={1}.", a, b);
        }
    }
}

故构造顺序为：父类具体构造 =>子类具体构造