ftp上传文件，下载文件，删除文件，改文件名，创建文件等等

c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\bin\Debug\Ftp.Demo.exe.config c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\bin\Debug\Ftp.Demo.exe c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\bin\Debug\Ftp.Demo.pdb c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\MainWindow.baml c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\MainWindow.g.cs c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\App.g.cs c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\Ftp.Demo_MarkupCompile.cache c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\Ftp.Demo.g.resources c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\Ftp.Demo.Properties.Resources.resources c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\Ftp.Demo.csproj.GenerateResource.Cache c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\Ftp.Demo.exe c:\users\administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\Ftp.Demo.pdb C:\Users\Administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\Ftp.Demo.csprojResolveAssemblyReference.cache C:\Users\Administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\bin\Debug\System.Net.FtpClient.dll C:\Users\Administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\bin\Debug\System.Net.FtpClient.xml C:\Users\Administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\Main.g.cs C:\Users\Administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\Ftp.Demo_MarkupCompile.lref C:\Users\Administrator\documents\visual studio 2017\Projects\Ftp.Demo\Ftp.Demo\obj\Debug\Main.baml