<SPAN style="FONT-SIZE: 18px">    public class Class1
    {
        public string name{ get; set; }
        public int score { get; set; }

    }</SPAN>

<SPAN style="FONT-SIZE: 18px">        public Form1()
        {
            InitializeComponent();
        }
        Class1 a = new Class1();
        Class1 b = new Class1();
        List<Class1> l = new List<Class1>();

        private void button1_Click(object sender, EventArgs e)
        {
            string name = "小明";
            Class1 c = l.Find(delegate(Class1 p) { return (p.name.Equals(name)); });
            c.score = 100;

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            a.name = "小明";
            a.score = 90;
            l.Add(a);

            b.name = "小紅";
            b.score = 99;
            l.Add(b);
        }</SPAN>