实现FTP文件上传下载，
资源文件列表
FTP文件上传下载/WindowsFormsApp2/.vs/WindowsFormsApp2/v15/.suo , 51200
FTP文件上传下载/WindowsFormsApp2/.vs/WindowsFormsApp2/v15/Server/sqlite3/db.lock , 0
FTP文件上传下载/WindowsFormsApp2/.vs/WindowsFormsApp2/v15/Server/sqlite3/storage.ide , 4096
FTP文件上传下载/WindowsFormsApp2/.vs/WindowsFormsApp2/v15/Server/sqlite3/storage.ide-shm , 32768
FTP文件上传下载/WindowsFormsApp2/.vs/WindowsFormsApp2/v15/Server/sqlite3/storage.ide-wal , 3193032
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/App.config , 189
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/bin/Debug/WindowsFormsApp2.exe , 13824
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/bin/Debug/WindowsFormsApp2.exe.config , 189
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/bin/Debug/WindowsFormsApp2.pdb , 38400
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/Form1.cs , 6892
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/Form1.Designer.cs , 3178
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/Form1.resx , 5817
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/FtpHelper.cs , 10600
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/DesignTimeResolveAssemblyReferences.cache , 1443
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache , 7276
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs , 0
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs , 0
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs , 0
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/WindowsFormsApp2.csproj.CoreCompileInputs.cache , 42
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/WindowsFormsApp2.csproj.FileListAbsolute.txt , 1145
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/WindowsFormsApp2.csproj.GenerateResource.cache , 1012
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/WindowsFormsApp2.csprojAssemblyReference.cache , 11490
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/WindowsFormsApp2.exe , 13824
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/WindowsFormsApp2.Form1.resources , 180
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/WindowsFormsApp2.pdb , 38400
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/obj/Debug/WindowsFormsApp2.Properties.Resources.resources , 180
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/Program.cs , 528
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/Properties/AssemblyInfo.cs , 1348
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/Properties/Resources.Designer.cs , 2845
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/Properties/Resources.resx , 5612
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/Properties/Settings.Designer.cs , 1103
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/Properties/Settings.settings , 249
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2/WindowsFormsApp2.csproj , 3660
FTP文件上传下载/WindowsFormsApp2/WindowsFormsApp2.sln , 1146
FTP文件上传下载/资料.txt , 54