C# constructor chain and extension method

父类构造函数先于子类构造函数执行，也就是说子类构造函数执行期间，父类已经构造出来，那么父类所有的成员都可以访问。

但是最好还是让父类的构造函数自己去处理自己的逻辑，子类去插手，就有点耦合的意思了。

#region extension method
    static class objectExtension {
        public static void Object(this Object obj) { Console.WriteLine("Object constructor!!!"); }
    }
    #endregion

    #region constructor chain
    abstract class abbase {
        public abbase()
        {
            objectExtension.Object(new Object());
            Console.WriteLine("abstract base class!!!");
        }
    }
    class overrides :abbase
    {
        public string NotVirtualFunc() { return "parent not virtual"; }
        public virtual string VirtualFunc(){return "virtual";}
        public overrides()
        {
            Console.WriteLine("parent constructor!!!");
        }
    }

    class SubClass : overrides {
        public SubClass()
        {
            Console.WriteLine("sub constructor!!!");
        }
        public override string VirtualFunc()
        {
            return base.VirtualFunc();
        }

        public new string NotVirtualFunc() { return "child not virtual"; }
    }
    #endregion

static void Main(string[] args)
        {
            
            SubClass child = new SubClass();
            Console.WriteLine(child.NotVirtualFunc());
            Console.ReadLine();
        }