public class Base
    {
        int i=0;

        public Base()
        {
            System.Console.WriteLine("我是基類構造器");
        }

    }

 class Program
    {
        static void Main(string[] args)
        {
            Base d = new Base();
        }
    }

/// <summary>
    /// 基類
    /// </summary>
    public class Base
    {
       public int baseint = 100;
        public Base()
        {
            System.Console.WriteLine("構造器：我是基類構造器");

        }

        private class Inner
        {
            public Inner()
            {
                System.Console.WriteLine("字段：我是基類Inner");
            }
        }

        /// <summary>
        /// 字段初使化
        /// </summary>
        private Inner inner = new Inner();
    }

   /// <summary>
   /// 子類
   /// </summary>
    class Derived : Base
    {
      

        public Derived()
        {
            System.Console.WriteLine("構造器：我是子類構造器");

        }

       private class Inner
        {
            public Inner()
            {
                System.Console.WriteLine("字段：我是子類Inner");
            }
        }

        /// <summary>
        /// 字段初使化
        /// </summary>
        private Inner inner = new Inner();

    }