static void Main(string[] args)
{
    for (int i = 0; i < Number(); i++)
        Console.WriteLine(i);

using System;
using System.Windows.Forms;

namespace WindowsFormsApplication1

//设置
listView1.View = View.Details;
listView1.GridLines = true;
listView1.FullRowSelect = true;
listView1.CheckBoxes = true;

private void Form2_Load(object sender, EventArgs e)
{
    using (SqlConnection conn = new SqlConnection("server=(local);database=Northwind;user id=sa;password=sa;"))

//引用命名空间System.Collections.Generic

Public Function Addition(a As Integer, b As Integer)
    Addition = a + b

//在panel1中添加20个Button
int row = -1;
int rowcount = 5;

for (int i = 1; i <= 20; i++)

notifyIcon1.BalloonTipIcon = ToolTipIcon.Info;