我不是编程新手，但我对C＃很新。 我正在尝试使用类的实例填充列表。 
 
 我希望下面的代码在控制台中显示数字0到9，但它重复9次十次。 显然，我做错了什么。 
 
 我怀疑在列表中添加“a”只是添加对“a”的引用，而不是class1的新实例。 我不知道我应该添加什么。 将新的class1实例添加到列表中的正确语法是什么？ 
 
 提前感谢您的回答！ 
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<class1> iList = new List<class1>();
            class1 a = new class1();

            for (int i = 0; i < 10; i++)
            {

                iList.Add(a);
                iList[i].var1 = i;
            }
            for (int i = 0; i < iList.Count; i++)
            {
                System.Console.Write("var1 of " + i + ": " + iList[i].var1 + "\r\n");
            }
            Console.ReadLine();
        }
    }

    class class1
    {
        public int var1;
    }
}

I am not new to programming but I am very new to C#. I am trying to populate a list with instances of a class. 
 
I would expect the following piece of code to display numbers 0 to 9 in the console but instead it repeats 9 ten times. Clearly I am doing something wrong. 
 
I am suspecting that adding "a" to the list simply adds a reference to "a", and not a new instance of class1. I am not sure what I should be adding though. What would be the correct syntax to add a new instance of class1 to the list? 
 
Thanks in advance for any answer!
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<class1> iList = new List<class1>();
            class1 a = new class1();

            for (int i = 0; i < 10; i++)
            {

                iList.Add(a);
                iList[i].var1 = i;
            }
            for (int i = 0; i < iList.Count; i++)
            {
                System.Console.Write("var1 of " + i + ": " + iList[i].var1 + "\r\n");
            }
            Console.ReadLine();
        }
    }

    class class1
    {
        public int var1;
    }
}

原文：https://stackoverflow.com/questions/34346423