string[] ss = new string[] { "a", "b", "c", "d" };
            Random rand = new Random();
            for (int i = 0; i < 3; i++)
            {
                MessageBox.Show(ss[rand.Next(ss.Length)]);
            }

------解决方案--------------------
把名字放到数组中，点击按钮后产生一个0~19之间的随机数，文本框显示对应的名字
C# code

public class Form1 : Form
{
    // button1, textbox1, ....

    string[] m_names = {"名字1", "名字2", ...};
    Random rand = new Random();

    private void button1_Click(object sender, EventArgs e)
    {
        int i = rand.Next(0, m_names.Length);
        textbox1.Text = m_names[i];
    }
}

------解决方案--------------------
C# code

 Random r = new Random();
        private void button5_Click(object sender, EventArgs e)
        {
            string[] name = new string[] {"张三","李四","王五" };
            MessageBox.Show(name[r.Next(name.Length)]);
}

------解决方案--------------------
探讨

C# code

private Random r = new Random();
private string[] name = new string[] {"张三","李四","王五" };
        private void button5_Click(object sender, EventArgs e)
        {
                        MessageBox.Sho……