Transitionals WPF 图片切换效果（各种淡入淡出）

#region License Revision: 0 Last Revised: 3/29/2006 8:21 AM
/******************************************************************************
Copyright （c） Microsoft Corporation.  All rights reserved.


This file is licensed under the Microsoft Public License （Ms-PL）. A copy of the Ms-PL should accompany this file. 
If it does not you can obtain a copy from: 

http://www.microsoft.com/resources/sharedsource/licensingbasics/publiclicense.mspx
******************************************************************************/
#endregion // License
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;

namespace Transitionals
{
    internal static class InternalExtensions
    {
        /// 

        /// Determines if an item of the 

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2017-11-09 02:49  Transitionals-master\
     文件         378  2017-11-09 02:49  Transitionals-master\.gitattributes
     文件        4884  2017-11-09 02:49  Transitionals-master\.gitignore
     目录           0  2017-11-09 02:49  Transitionals-master\BuildProcessTemplates\
     文件       58655  2017-11-09 02:49  Transitionals-master\BuildProcessTemplates\DefaultTemplate.11.1.xaml
     文件       65235  2017-11-09 02:49  Transitionals-master\BuildProcessTemplates\DefaultTemplate.xaml
     文件       22440  2017-11-09 02:49  Transitionals-master\BuildProcessTemplates\LabDefaultTemplate.11.xaml
     文件        6803  2017-11-09 02:49  Transitionals-master\BuildProcessTemplates\UpgradeTemplate.xaml
     文件        2629  2017-11-09 02:49  Transitionals-master\Microsoft Public License （Ms-PL）.txt
     文件        3433  2017-11-09 02:49  Transitionals-master\README.md
     文件      606722  2017-11-09 02:49  Transitionals-master\Transitionals.chm
     文件        3333  2017-11-09 02:49  Transitionals-master\Transitionals.sln
     目录           0  2017-11-09 02:49  Transitionals-master\WPF\
     目录           0  2017-11-09 02:49  Transitionals-master\WPF\framework\
     目录           0  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\
     目录           0  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Controls\
     文件        1078  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Controls\Slideshow.xaml
     文件       17303  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Controls\Slideshow.xaml.cs
     文件         727  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Controls\SlideshowItem.cs
     文件        9703  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Controls\SlideshowPanel.cs
     文件       27618  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Controls\TransitionElement.cs
     文件        3008  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Controls\TransitionEventArgs.cs
     目录           0  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Documentation\
     文件       34040  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Documentation\Getting Started.html
     目录           0  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Documentation\Images\
     文件        2719  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Documentation\Images\TransitionalsSmall.jpg
     目录           0  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Help\
     文件        3210  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Help\TransitionalsHelp.shfb
     文件         307  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Help\TransitionalsHelp.sitemap
     文件        2692  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\InternalExtensions.cs
     目录           0  2017-11-09 02:49  Transitionals-master\WPF\framework\Transitionals\Properties\
............此处省略85个文件信息