列表和列表之间的歧义。我该怎么解决这个问题？

Question

好的，这是我的代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;

namespace Phonebook
{
    struct PhoneBookEntry
    {
        public string name;
        public string phone;
    }

    public partial class Form1 : Form
    {

        private List<PhoneBookEntry> phoneList =
            new List<PhoneBookEntry>();

        public Form1()
        {
            InitializeComponent();
        }

        //Reads PhoneList.txt, and stores its objects in phoneList.
        private void ReadFile()
        {
            try
            {
                StreamReader inputFile;
                string line;

                PhoneBookEntry entry = new PhoneBookEntry();

                char[] delim = { ',' }; //Create array.

                inputFile = File.OpenText("PhoneList.txt"); //Open the .txt file.

                //Read file.
                while (!inputFile.EndOfStream)
                {
                    //Read line from file.
                    line = inputFile.ReadLine();

                    //Tokenize the line.
                    string[] tokens = line.Split(delim);

                    //Store tokens in the entry object.
                    entry.name = tokens[0];
                    entry.phone = tokens[1];

                    //Add it to the list.
                    phoneList.Add(entry);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        //Display names.
        private void DisplayNames()
        {
            foreach (PhoneBookEntry entry in phoneList)
            {
                nameListBox.Items.Add(entry.name);
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            ReadFile(); //Read PhoneList.txt
            DisplayNames(); //Display names.
        }

        private void exitButton_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

它的意思是获取一个文件，读取每一行，把它放在列表框中，然后在单击名称时显示数字。问题是VS正在发送以下错误：

Error   CS0229  Ambiguity between 'Form1.phoneList' and 'Form1.phoneList'   Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.cs    71
Error   CS0229  Ambiguity between 'Form1.phoneList' and 'Form1.phoneList'   Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.cs    59
Error   CS0229  Ambiguity between 'Form1.phoneList' and 'Form1.phoneList'   Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.Designer.cs   31
Error   CS0229  Ambiguity between 'Form1.phoneList' and 'Form1.phoneList'   Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.Designer.cs   40
Error   CS0229  Ambiguity between 'Form1.phoneList' and 'Form1.phoneList'   Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.Designer.cs   41
Error   CS0229  Ambiguity between 'Form1.phoneList' and 'Form1.phoneList'   Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.Designer.cs   42
Error   CS0229  Ambiguity between 'Form1.phoneList' and 'Form1.phoneList'   Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.Designer.cs   43
Error   CS0229  Ambiguity between 'Form1.phoneList' and 'Form1.phoneList'   Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.Designer.cs   44
Error   CS0229  Ambiguity between 'Form1.phoneList' and 'Form1.phoneList'   Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.Designer.cs   92
Error   CS1579  foreach statement cannot operate on variables of type 'Phonebook.Form1.phoneList' because 'Phonebook.Form1.phoneList' does not contain a public definition for 'GetEnumerator'  Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.cs    71
Error   CS0103  The name 'nameListBox' does not exist in the current context    Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.cs    73
Error   CS0102  The type 'Form1' already contains a definition for 'phoneList'  Phonebook   D:\Google Drive\VS Projects\Phonebook\Phonebook\Form1.cs    23

这个项目是为我的C#入门课程，我确保一切都是正确的，但我只是无法使它正常工作。这里有什么问题？

Answer 1

Error   CS0102  The type 'Form1' already contains a definition for 'phoneList'

您有一个名为phoneList的控件，还有一个名为phoneList的列表。编译器不知道你指的是哪一个。说出其中一个不同的东西。

我看到使用的惯例之一(有时我也会这样做)是使用控制类型缩写作为后缀或前缀。例如：

phoneList_lb，lbPhoneList，phoneListLb

只是告诉你，你不是在处理代码中的某些东西，而是一个控制。

Answer 2

我认为您错误地将表单设计器中的ListBox控件命名为phoneList，并声明了另一个名为phoneList的列表。

将控件命名为不同。在designer上创建的每个控件都将具有同名的相应变量声明。

将控件命名为phoneListBox，然后设置值：

phoneListBox.Items.AddRange(phoneList.ToArray());