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

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

????????private?void?textBox1_TextChanged（object?sender?EventArgs?e）
????????{

????????}

????????private?void?button2_Click（object?sender?EventArgs?e）
????????{
????????????Close（）;
????????}

????????private?void?button1_Click（object?sender?EventArgs?e）
????????{
????????????//declare
????????????int?a?b;
????????????string?c;
????????????//input
????????????c?=?textBox1.Text;
????????????//process
????????????a?=?int.Parse（c）;
????????????b?=?a?*?a;
????????????//output
????????????label3.Text?=?b.ToString（）;
????????}
????}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-10-24?13:58??square\
?????目錄???????????0??2019-10-24?13:52??square\.vs\
?????目錄???????????0??2019-10-24?13:52??square\.vs\square\
?????目錄???????????0??2019-10-24?13:52??square\.vs\square\v16\
?????文件???????50176??2019-10-24?14:04??square\.vs\square\v16\.suo
?????目錄???????????0??2019-10-24?13:52??square\.vs\square\v16\Server\
?????目錄???????????0??2019-10-24?14:01??square\.vs\square\v16\Server\sqlite3\
?????文件???????????0??2019-10-24?13:52??square\.vs\square\v16\Server\sqlite3\db.lock
?????文件??????598016??2019-10-24?13:59??square\.vs\square\v16\Server\sqlite3\storage.ide
?????文件?????????189??2019-10-24?13:52??square\App.config
?????目錄???????????0??2019-10-24?13:52??square\bin\
?????目錄???????????0??2019-10-24?13:59??square\bin\Debug\
?????文件????????9216??2019-10-24?13:59??square\bin\Debug\square.exe
?????文件?????????189??2019-10-24?13:52??square\bin\Debug\square.exe.config
?????文件???????28160??2019-10-24?13:59??square\bin\Debug\square.pdb
?????文件?????????945??2019-10-24?13:58??square\Form1.cs
?????文件????????5823??2019-10-24?13:58??square\Form1.Designer.cs
?????文件????????5817??2019-10-24?13:58??square\Form1.resx
?????目錄???????????0??2019-10-24?13:52??square\obj\
?????目錄???????????0??2019-10-24?14:00??square\obj\Debug\
?????文件?????????823??2019-10-24?13:52??square\obj\Debug\DesignTimeResolveAssemblyReferences.cache
?????文件????????7140??2019-10-24?13:52??square\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????文件?????????620??2019-10-24?13:59??square\obj\Debug\square.csproj.FileListAbsolute.txt
?????文件????????1012??2019-10-24?13:58??square\obj\Debug\square.csproj.GenerateResource.cache
?????文件???????11625??2019-10-24?14:00??square\obj\Debug\square.csprojAssemblyReference.cache
?????文件????????9216??2019-10-24?13:59??square\obj\Debug\square.exe
?????文件?????????180??2019-10-24?13:58??square\obj\Debug\square.Form1.resources
?????文件???????28160??2019-10-24?13:59??square\obj\Debug\square.pdb
?????文件?????????180??2019-10-24?13:58??square\obj\Debug\square.Properties.Resources.resources
?????目錄???????????0??2019-10-24?13:52??square\obj\Debug\TempPE\
?????文件?????????521??2019-10-24?13:52??square\Program.cs
............此處省略8個文件信息