DEV documentManager 用法

DEV版本：12.1。前段时间写DEMO突然发现了一个很不起眼的控件：documentManager，可能网上这方面的资料也比较少，或者是本来用的人也比较少，所以自己一个人琢磨了好一阵子终于弄了个DEMO出来，希望有需要的朋友可以借鉴并互相学习。

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2016-07-07 10:34  WindowsFormsApplication12\
     目录           0  2016-07-07 13:23  WindowsFormsApplication12\WindowsFormsApplication12\
     文件         965  2016-07-07 10:34  WindowsFormsApplication12\WindowsFormsApplication12.sln
     文件       28160  2016-07-07 13:57  WindowsFormsApplication12\WindowsFormsApplication12.suo
     目录           0  2016-07-07 11:20  WindowsFormsApplication12\WindowsFormsApplication12\bin\
     目录           0  2016-07-07 11:32  WindowsFormsApplication12\WindowsFormsApplication12\bin\Debug\
     文件       20480  2016-07-07 13:23  WindowsFormsApplication12\WindowsFormsApplication12\bin\Debug\WindowsFormsApplication12.exe
     文件       46592  2016-07-07 13:23  WindowsFormsApplication12\WindowsFormsApplication12\bin\Debug\WindowsFormsApplication12.pdb
     文件       11592  2016-07-07 13:24  WindowsFormsApplication12\WindowsFormsApplication12\bin\Debug\WindowsFormsApplication12.vshost.exe
     文件         375  2016-07-07 12:16  WindowsFormsApplication12\WindowsFormsApplication12\Form1.cs
     文件        9953  2016-07-07 12:16  WindowsFormsApplication12\WindowsFormsApplication12\Form1.Designer.cs
     文件        6018  2016-07-07 12:16  WindowsFormsApplication12\WindowsFormsApplication12\Form1.resx
     文件         589  2016-07-07 11:57  WindowsFormsApplication12\WindowsFormsApplication12\Form2.cs
     文件        8990  2016-07-07 11:50  WindowsFormsApplication12\WindowsFormsApplication12\Form2.Designer.cs
     文件        6018  2016-07-07 11:50  WindowsFormsApplication12\WindowsFormsApplication12\Form2.resx
     文件         382  2016-07-07 11:33  WindowsFormsApplication12\WindowsFormsApplication12\Form3.cs
     文件        2810  2016-07-07 11:33  WindowsFormsApplication12\WindowsFormsApplication12\Form3.Designer.cs
     文件        5814  2016-07-07 11:33  WindowsFormsApplication12\WindowsFormsApplication12\Form3.resx
     文件         594  2016-07-07 13:23  WindowsFormsApplication12\WindowsFormsApplication12\Form4.cs
     文件       17596  2016-07-07 13:23  WindowsFormsApplication12\WindowsFormsApplication12\Form4.Designer.cs
     文件        6191  2016-07-07 13:23  WindowsFormsApplication12\WindowsFormsApplication12\Form4.resx
     目录           0  2016-07-07 10:34  WindowsFormsApplication12\WindowsFormsApplication12\obj\
     目录           0  2016-07-07 13:23  WindowsFormsApplication12\WindowsFormsApplication12\obj\Debug\
     文件       53014  2016-07-07 11:32  WindowsFormsApplication12\WindowsFormsApplication12\obj\Debug\ResolveAssemblyReference.cache
     目录           0  2016-07-07 10:34  WindowsFormsApplication12\WindowsFormsApplication12\obj\Debug\TempPE\
     文件        1887  2016-07-07 13:24  WindowsFormsApplication12\WindowsFormsApplication12\obj\Debug\WindowsFormsApplication12.csproj.FileListAbsolute.txt
     文件        1021  2016-07-07 13:23  WindowsFormsApplication12\WindowsFormsApplication12\obj\Debug\WindowsFormsApplication12.csproj.GenerateResource.Cache
     文件       20480  2016-07-07 13:23  WindowsFormsApplication12\WindowsFormsApplication12\obj\Debug\WindowsFormsApplication12.exe
     文件         574  2016-07-07 12:16  WindowsFormsApplication12\WindowsFormsApplication12\obj\Debug\windowsformsapplication12.exe.licenses
     文件         180  2016-07-07 12:16  WindowsFormsApplication12\WindowsFormsApplication12\obj\Debug\WindowsFormsApplication12.Form1.resources
     文件         180  2016-07-07 12:08  WindowsFormsApplication12\WindowsFormsApplication12\obj\Debug\WindowsFormsApplication12.Form2.resources
............此处省略13个文件信息