C# と VB.NET の質問掲示板

ここを読んでみてください
http://www.atmarkit.co.jp/fdotnet/special/generics01/generics01_01.html

[追記]
ヒント：
 public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            List<Test> list = new List<Test>();

            Test ts = new Test("AAA", "BBB");

            list.Add(ts);

            MessageBox.Show(list[0].Hoge2);
        }
    }
    class Test
    {
        private string tHoge;
        private string tHoge2;
        public Test(string hoge, string hoge2)
        {
            tHoge = hoge;
            tHoge2 = hoge2;
        }
        public string Hoge
        {
            get { return tHoge;}
            set{ tHoge = value;}
        }
        public string Hoge2
        {
            get { return tHoge2; }
            set { tHoge2 = value; }
        }
    }