c# 选择多个图片并将其合成Gif动画

using System;
using System.Drawing;
using System.IO;

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#region Java
/**
 * Class AnimatedGifEncoder - Encodes a GIF file consisting of one or
 * more frames.
 * 

 * Example:
 *    AnimatedGifEncoder e = new AnimatedGifEncoder（）;
 *    e.start（outputFileName）;
 *    e.setDelay（1000）;   // 1 frame per sec
 *    e.addframe（image1）;
 *    e.addframe（image2）;
 *

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-12-12 07:19  .vs\
     目录           0  2019-12-12 07:19  .vs\NGif\
     目录           0  2019-12-12 07:20  .vs\NGif\v16\
     文件       23552  2019-12-12 07:44  .vs\NGif\v16\.suo
     目录           0  2019-12-12 07:20  .vs\NGif\v16\Server\
     目录           0  2019-12-12 07:44  .vs\NGif\v16\Server\sqlite3\
     文件           0  2019-12-12 07:20  .vs\NGif\v16\Server\sqlite3\db.lock
     文件      577536  2019-12-12 07:44  .vs\NGif\v16\Server\sqlite3\storage.ide
     目录           0  2019-12-12 07:20  Backup\
     目录           0  2019-12-12 07:20  Backup\Components\
     文件       14635  2005-09-16 15:04  Backup\Components\AnimatedGifEncoder.cs
     文件         461  2005-09-16 15:04  Backup\Components\AssemblyInfo.cs
     文件        4104  2010-08-26 10:14  Backup\Components\Components.csproj
     文件        2081  2010-08-26 10:14  Backup\Components\Components.csproj.user
     文件       20055  2005-09-16 15:04  Backup\Components\GifDecoder.cs
     文件        8939  2005-09-16 15:04  Backup\Components\LZWEncoder.cs
     文件       14323  2005-09-16 15:04  Backup\Components\NeuQuant.cs
     文件        1425  2010-08-26 10:55  Backup\NGif.sln
     目录           0  2019-12-12 07:20  Backup\WindowsApplication1\
     文件        2032  2010-08-26 10:34  Backup\WindowsApplication1\Form1.Designer.cs
     文件        1344  2010-08-26 10:52  Backup\WindowsApplication1\Form1.cs
     文件        5814  2010-08-26 10:34  Backup\WindowsApplication1\Form1.resx
     文件         478  2010-08-26 10:33  Backup\WindowsApplication1\Program.cs
     目录           0  2019-12-12 07:20  Backup\WindowsApplication1\Properties\
     文件        1186  2010-08-26 10:33  Backup\WindowsApplication1\Properties\AssemblyInfo.cs
     文件        2892  2010-08-26 10:33  Backup\WindowsApplication1\Properties\Resources.Designer.cs
     文件        5612  2010-08-26 10:33  Backup\WindowsApplication1\Properties\Resources.resx
     文件        1102  2010-08-26 10:33  Backup\WindowsApplication1\Properties\Settings.Designer.cs
     文件         249  2010-08-26 10:33  Backup\WindowsApplication1\Properties\Settings.settings
     文件        3486  2010-08-26 10:34  Backup\WindowsApplication1\WindowsApplication1.csproj
     目录           0  2010-08-26 10:55  Components\
............此处省略66个文件信息