//基类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MVATwentyQuestions
{
    class Test
    {
        public string _name = "";

        public Test(string name)
        {
            _name = name;
        }

        public virtual void ConvertToUpper()
        {
            _name = _name.ToUpper();
        }
    }
}

//子类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MVATwentyQuestions
{
    class InheritTest : Test
    {
        //base("NewName");	//错误的调用，所以注释
		
		//继承基类的构造器
		public InheritTest(string name) : base(name)
        {
           
        }
		//继承基类的构造器，传入该构造器的参数为一个值的方法
        public InheritTest(string name) : base(ModifyBase(name))
        {
           
        }

        private static string ModifyBase(string newName)
        {
            return newName.ToUpper();
        }
    }
}

//主方法
static void Main(string[] args)
{
    Console.WriteLine();
    Test nTest = new Test("Base");
    Console.WriteLine(nTest._name);

    InheritTest iTest = new InheritTest("NewName");
    Console.WriteLine(iTest._name);
}

继承基类的构造器
结果：
Base
NewName

继承基类的构造器，传入该构造器的参数为一个值的方法
结果：
Base
NEWNAME