using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Net;
using?System.Runtime.InteropServices;
using?System.Text;
using?System.Threading.Tasks;
using?System.Windows.Forms;

namespace?Internet
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?button1_Click（object?sender?EventArgs?e）
????????{
????????????if（WebRequestTest（））
????????????{
????????????????MessageBox.Show（“該計(jì)算機(jī)已經(jīng)聯(lián)網(wǎng)“）;
????????????}
????????????else
????????????{
????????????????MessageBox.Show（“該計(jì)算機(jī)尚未聯(lián)網(wǎng)“）;
????????????}

????????}
????????public?static?bool?WebRequestTest（）//測(cè)試成功（需vpn）
????????{
????????????string?url?=?“http://www.google.com“;
????????????try
????????????{
????????????????System.Net.WebRequest?myRequest?=?System.Net.WebRequest.Create（url）;
????????????????System.Net.WebRespo

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

????..A..H.?????31232??2020-07-21?09:26??Internet\.vs\Internet\v15\.suo

?????文件??????????0??2020-07-20?12:53??Internet\.vs\Internet\v15\Server\sqlite3\db.lock

?????文件???????4096??2020-07-20?12:53??Internet\.vs\Internet\v15\Server\sqlite3\storage.ide

?????文件??????32768??2020-07-21?09:24??Internet\.vs\Internet\v15\Server\sqlite3\storage.ide-shm

?????文件????2748072??2020-07-21?09:26??Internet\.vs\Internet\v15\Server\sqlite3\storage.ide-wal

?????文件????????187??2020-07-20?12:53??Internet\Internet\App.config

?????文件??????11264??2020-07-21?09:26??Internet\Internet\bin\Debug\Internet.exe

?????文件????????187??2020-07-20?12:53??Internet\Internet\bin\Debug\Internet.exe.config

?????文件??????32256??2020-07-21?09:26??Internet\Internet\bin\Debug\Internet.pdb

?????文件???????4320??2020-07-21?09:26??Internet\Internet\Form1.cs

?????文件???????7176??2020-07-21?09:26??Internet\Internet\Form1.Designer.cs

?????文件???????5817??2020-07-21?09:26??Internet\Internet\Form1.resx

?????文件???????3531??2020-07-20?12:55??Internet\Internet\Internet.csproj

?????文件???????1431??2020-07-21?09:25??Internet\Internet\obj\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????7060??2020-07-20?12:53??Internet\Internet\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件?????????42??2020-07-20?12:53??Internet\Internet\obj\Debug\Internet.csproj.CoreCompileInputs.cache

?????文件????????625??2020-07-20?13:00??Internet\Internet\obj\Debug\Internet.csproj.FileListAbsolute.txt

?????文件???????1012??2020-07-21?09:26??Internet\Internet\obj\Debug\Internet.csproj.GenerateResource.cache

?????文件??????11466??2020-07-20?12:53??Internet\Internet\obj\Debug\Internet.csprojAssemblyReference.cache

?????文件??????11264??2020-07-21?09:26??Internet\Internet\obj\Debug\Internet.exe

?????文件????????180??2020-07-21?09:26??Internet\Internet\obj\Debug\Internet.Form1.resources

?????文件??????32256??2020-07-21?09:26??Internet\Internet\obj\Debug\Internet.pdb

?????文件????????180??2020-07-20?13:00??Internet\Internet\obj\Debug\Internet.Properties.Resources.resources

?????文件??????????0??2020-07-20?12:53??Internet\Internet\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs

?????文件??????????0??2020-07-20?12:53??Internet\Internet\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs

?????文件??????????0??2020-07-20?12:53??Internet\Internet\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs

?????文件????????520??2020-07-20?12:53??Internet\Internet\Program.cs

?????文件???????1314??2020-07-20?12:53??Internet\Internet\Properties\AssemblyInfo.cs

?????文件???????2829??2020-07-20?12:53??Internet\Internet\Properties\Resources.Designer.cs

?????文件???????5612??2020-07-20?12:53??Internet\Internet\Properties\Resources.resx

............此處省略19個(gè)文件信息