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

namespace?ch01
{
????public?partial?class?Form1?:?Form
????{
????????//定義一個委托
????????public?delegate?string?deleTransfer（string?s）;//注意方法簽名

????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?btnTest_Click（object?sender?EventArgs?e）
????????{
????????????//LinQ體驗
????????????int[]?arr?=?{?123123121545464856785};
????????????
????????????////獲取大于50的數(shù)
????????????////沒有LinQ我們怎么做？
????????????//ArrayList?result?=?new?ArrayList（）;
????????????//for?（int?i?=?0;?i?????????????//{
????????????//????if?（arr[i]?>?50）
????????????//????{
????????????//????????result.Add（arr[i]）;
????????????//????}
????????????//}
????????????////打印result就OK了
????????????//for?（int?i?=?0;?i?????????????//{
????????????//????Console.WriteLine（result[i]）;
????????????//}

????????????//有了LinQ后我們可以這么做
????????????//獲取大于50的數(shù)
???????????IEnumerable?ie=?arr.Select（p=>p）.Where（p=>p>50）;
????????????//輸出---該部分代碼可重用
???????????IEnumerator?result=?ie.GetEnumerator（）;
???????????while?（result.MoveNext（））
???????????{
???????????????Console.WriteLine（result.Current）;
???????????}
????????}

????????private?void?btnExtraMethod_Click（object?sender?EventArgs?e）
????????{
????????????//拓展方法----
????????????string?s?=?“asEdSadaDsdSsa“;
????????????Console.WriteLine（s.ToUpper（））;
????????????Console.WriteLine（s.ToLower（））;
????????????Console.WriteLine（s.ToPascal（））;
????????????Console.WriteLine（s.ToPascal（2））;
????????}

????????private?void?btnLambda_Click（object?sender?EventArgs?e）
????????{
????????????//Lambda???來源

????????????//.net?frameWork?1.0?委托---函數(shù)指針
????????????//deleTransfer?trans?=?new?deleTransfer（ToPascal）;//委托指向方法ToPascal
????????????//Console.WriteLine（trans（“abcdEFGH“））;

????????????//.net?frameWork?2.0?匿名方法
????????????//deleTransfer?trans?=?delegate（string?s）?{?return?s.Substring（0?1）.ToUpper（）?+?s.Substring（1）.ToLower（）;?};
????????????//Console.WriteLine（trans（“abcdEFGH“））;

????????????//.net?frameWork?3.5?Lambda
????????????//deleTransfer?trans=（s）=>（s.Substring（0?1）.ToUpper（）?+?s.Substring（1）.ToLower（））;
????????????deleTransfer?trans?=?s?=>s.Substring（0?1）.ToUpper（）?+?s.Substring（1）.ToLower（）;
????????????Console.WriteLine（trans（“abcdEFGH“））;
????????}

????????//將字符串的首寫字母轉(zhuǎn)化為大寫字母的方法
????????public?string?ToPascal（string?s）
????????{
????????????return?s.Substring（0?1）.ToUpper（）?+?s.Substring（1）.ToLower（）;
????????}

????????private?void?btnSelect_Click（object?sender?EventArgs?e）
????????{
????????????//LinQ?To?objects
????????????//泛型集合數(shù)據(jù)persons
????????????List?persons?=?new?List（）;
????????????persons.Add（“zhang?san“）;
????????????person

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????11776??2009-08-18?22:12??Demo\ch01\ch01\bin\Debug\ch01.exe

?????文件??????30208??2009-08-18?22:12??Demo\ch01\ch01\bin\Debug\ch01.pdb

?????文件??????14328??2009-08-18?22:12??Demo\ch01\ch01\bin\Debug\ch01.vshost.exe

?????文件????????490??2007-07-21?01:33??Demo\ch01\ch01\bin\Debug\ch01.vshost.exe.manifest

?????文件???????3719??2009-08-18?20:48??Demo\ch01\ch01\ch01.csproj

?????文件???????5560??2009-08-18?22:13??Demo\ch01\ch01\Form1.cs

?????文件???????4041??2009-08-18?21:45??Demo\ch01\ch01\Form1.Designer.cs

?????文件???????5814??2009-08-18?21:45??Demo\ch01\ch01\Form1.resx

?????文件????????631??2009-08-18?22:12??Demo\ch01\ch01\obj\Debug\ch01.csproj.FileListAbsolute.txt

?????文件????????847??2009-08-18?22:00??Demo\ch01\ch01\obj\Debug\ch01.csproj.GenerateResource.Cache

?????文件??????11776??2009-08-18?22:12??Demo\ch01\ch01\obj\Debug\ch01.exe

?????文件????????180??2009-08-18?22:00??Demo\ch01\ch01\obj\Debug\ch01.Form1.resources

?????文件??????30208??2009-08-18?22:12??Demo\ch01\ch01\obj\Debug\ch01.pdb

?????文件????????180??2009-08-18?20:52??Demo\ch01\ch01\obj\Debug\ch01.Properties.Resources.resources

?????文件????????485??2009-08-18?20:48??Demo\ch01\ch01\Program.cs

?????文件???????1340??2009-08-18?20:48??Demo\ch01\ch01\Properties\AssemblyInfo.cs

?????文件???????2858??2009-08-18?20:48??Demo\ch01\ch01\Properties\Resources.Designer.cs

?????文件???????5612??2009-08-18?20:48??Demo\ch01\ch01\Properties\Resources.resx

?????文件???????1089??2009-08-18?20:48??Demo\ch01\ch01\Properties\Settings.Designer.cs

?????文件????????249??2009-08-18?20:48??Demo\ch01\ch01\Properties\Settings.settings

?????文件????????902??2009-08-18?20:48??Demo\ch01\ch01.sln

????..A..H.?????14336??2009-08-18?22:15??Demo\ch01\ch01.suo

?????文件????????477??2009-08-18?21:45??Demo\readme.txt

?????目錄??????????0??2009-08-18?20:59??Demo\ch01\ch01\obj\Debug\Refactor

?????目錄??????????0??2009-08-18?20:48??Demo\ch01\ch01\obj\Debug\TempPE

?????目錄??????????0??2009-08-18?20:52??Demo\ch01\ch01\bin\Debug

?????目錄??????????0??2009-08-18?22:12??Demo\ch01\ch01\obj\Debug

?????目錄??????????0??2009-08-18?20:48??Demo\ch01\ch01\bin

?????目錄??????????0??2009-08-18?20:48??Demo\ch01\ch01\obj

?????目錄??????????0??2009-08-18?20:48??Demo\ch01\ch01\Properties

............此處省略6個文件信息