小白一个，c#有一道题不会做C#中在窗体上建立一个标签文本框一个按钮在列表框中列有3个同学的姓名，当选定某个学生姓名时，单击此按钮则在文本框中显示出该学生的班级以下是我百度的例子，里面的 student类不用定义吗？如果要的话如何定义，直接百度的答案前头加下面这个吗？public class student {public student (string _name,string_class){this.name=_name;this.class=_class;}public string name{get;set;}public string class{get;set;}}——————-下面是百度的——————public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){this.textBox1.Text = stu1[this.listBox1.SelectedIndex].classes;}student[] stu1=new student [3];private void Form1_Load(object sender, EventArgs e){stu1[0] = new student("s0", "c00");stu1[1] = new student("s1", "c01");stu1[2] = new student("s2", "c02");for (int i = 0; i < stu1.Length; i++)this.listBox1.Items.Add(stu1[i].name);}}