RELEASES.md

Release Notes

32.3.2

• Fix: Downloading or uploading a directory can generate incorrect local paths
• Fix: Expose LoadProfile API so it can be called by the generated code from AutoDetect

32.3.1

• New: ListingDataType property to get file listings in ASCII/Binary
• New: DownloadZeroByteFiles property to control if zero-byte files should be downloaded or skipped
• Fix: Downloading 0-byte files crashes since no data downloaded

32.3.0

• New: All server-specific handlers moved to dedicated classes that extend FtpBaseServer
• New: Ability to handle custom non-standard FTP servers by extending FtpBaseServer
• Fix: Only overwrite local file after the first bytes downloaded of a remote file

32.2.2

• New: Tracking progress with FXP transfers is supported for all transfer modes
• New: Track low-level progress with new TransferredBytes in FtpProgress class (thanks Adhara3)
• New: FXPProgressInterval property to control how often FXP progress reports are sent
• Fix: Hide TransferFileFXPInternal because its an internal transfer method and not to be used directly

32.2.1

• Fix: FtpFileExtensionRule was failing to compare extensions unless they were prefixed with a dot

32.2.0

• New: GetChecksum allows you to specify a hash algorithm to be run on the server if supported
• New: GetChecksum has special support for switching the server-side algorithm for HASH command support
• New: FXP file transfer now validates the file using the first mutually supported algorithm

32.1.1

• Fix: Incorrectly formatted string returned by utility method TransferSpeedToString

32.1.0

• New: CompareFile and CompareFileAsync methods to quickly perform various equality checks on a uploaded/downloaded file

32.0.0

• Fix: When download fails and we need to retry on failed verification, ensure that file is re-downloaded
• Fix: When FXP transfer fails and we need to retry on failed verification, ensure that file is re-transfered
• Fix: When uploaded file is skipped, FtpStatus.Failed is returned instead of FtpStatus.Skipped
• Fix: Properly handle 4xx and 5xx series of errors and indicate failure when uploading or downloading files
• Fix: Correctly detect if server-side recursion is supported otherwise fallback to manual directory recursion
• Fix: Only resume download of files if Append mode is selected (in Overwrite mode we restart the download)
• Change: Upload and UploadAsync now returns FtpStatus to indicate skipped, success or failed

31.3.2

• Fix: Proper session handling for FXP connections and disconnection of cloned connections
• Performance: Reduce redundant file size check in DownloadFile when appending is used

31.3.1

• New: AutoDetect and AutoConnect now auto-configure for Azure FTP servers using known connection settings
• Improve code generation of FtpProfile to use LoadProfile rather than setting each property individually
• Add advanced Timeout and Socket settings to FtpProfile for Azure auto configuration
• Fix: All exception classes now inherit from FtpException
• All exceptions and FtpProfile are now serializable in .NET Framework

31.3.0

• New: TransferFile and TransferDirectory methods to transfer files from server to server (thanks n0ix)
• New: FXP (File Transfer Protocol) implementation to support direct server-to-server transfers (thanks n0ix)

31.2.0

• New: Predefined rules for filtering on file name using regular expressions (thanks n0ix)
• New: Predefined rules for filtering on folder name using regular expressions (thanks n0ix)
• Fix: Don't calculate ETA and percentage of FtpProgress if file size is zero (thanks Adhara3)
• Fix: GetFilePermissions should use GetObjectInfo instead of GetListing to prevent incorrect filepaths

31.1.0

• New: Support for MMD5 file hashing command to validate downloaded/uploaded files. (thanks n0ix)
• Change: Disable all Begin* and End* methods for .NET 4.5 and onwards as async/await is supported.
• Improve: GetHashAlgorithmAsync and SetHashAlgorithmAsync implemented as true async methods with cancellation support
• Improve: GetObjectInfoAsync implemented as true async methods with cancellation support

31.0.0

• New: Download and upload file methods indicate if file was transferred, skipped or failed to transfer
• New: C# and VB.NET Examples for all file and folder transfer methods
• New: VB.NET Examples for all methods (not included in Nuget package but available on Github)
• Change: DownloadFile and UploadFile return FtpStatus instead of boolean flag for tri-state feedback

30.2.0

• New: Support for XCRC FTP Command and CRC32 hash support to validate downloaded/uploaded files (thanks n0ix)

30.1.1

• Fix: Calculation of local file path during DownloadFolder sometimes ignores base directory

30.1.0

• New: Support multi-file progress tracking by indicating file index and local & remote path of the file
• New: UploadDirectory and DownloadDirectory now supports tracking progress of the entire task
• New: UploadFiles and DownloadFiles now supports tracking progress for both sync/async methods
• Fix: Update IFtpClient interface by adding new UploadDirectory and DownloadDirectory methods
• Fix: Correctly determine file exists on servers that don't support SIZE command and return error 550
• Fix: Support more strings to determine if file exists using SIZE command

30.0.0

• New: UploadDirectory and UploadDirectoryAsync methods to recursively upload or mirror a directory
• New: DownloadDirectory and DownloadDirectoryAsync methods to recursively download or mirror a directory
• New: Rule engine to filter files that should be uploaded/downloaded according to multiple user-defined rules
• New: Predefined rules for filtering on folder name, useful for blacklisting certain system folders
• New: Predefined rules for filtering on file name or file extensions, useful for transferring a subset of files
• New: Predefined rules for filtering on file size, useful for filtering out very large files
• New: Ability to determine parent/self/child directories in listing using SubType property of FtpListItem
• Fix: Machine listings sometimes cause infinite recursion in GetListing when recursing into self directory
• Change: CreateDirectory and CreateDirectoryAsync now return a flag indicating if it was created or skipped
• Change: Use public fields instead of public properties for FtpListItem
• Change: Improve performance of CreateDirectory by skipping the directory exists check

29.0.4

• Fix: Detect "file size not allowed in ASCII" string for French FTP servers

29.0.3

• Fix: TimeoutException when trying to read FTP server reply after Download/Upload

29.0.2

• New: Add SendHost and SendHostDomain to control if HOST command is sent after handshake (thanks dansharpe83)

29.0.1

• Fix: Read stale NOOP responses after file transfer and also after 226 Transfer complete (thanks aliquid)
• Fix: Correct default value for TimeConversion property to assume UTC timestamps

29.0.0

• New: Support .NET Standard 2.0
• New: Keep control socket alive during long file transfers using NOOP (thanks aliquid)
• New: Add NoopInterval property to control interval of NOOP commands (thanks aliquid)
• New: Add TimeConversion property to control if timestamps are converted from UTC into local time
• Refactor: Rename FtpExists to FtpRemoteExists to make its usage clear
• New: Support detection of IBM z/OS and MVS FTP OS and server (allows for server specific commands)
• New: New constructors for FtpClient to support hostnames in Uri format
• Fix: Always send progress reports after file download, even for zero-length files

28.0.5

• New: ValidateCertificateRevocation property to control if certificate revocation is checked.

28.0.4

• New: ValidateAnyCertificate property to validate any received server certificate, useful for Powershell
• Fix: Default SSL protocol used in .NET 4.5+ release is now TLS 1.2 (latest supported protocol)

28.0.3

• New: Override the server-specific recursive LIST detection by setting RecursiveList
• Fix typo in IP parsing regex that causes fallback to Host IP to fail (thanks Andy Whitfield)

28.0.2

• Fix: Verification of the MD5 Hash when file name contains spaces (thanks Nimelo)

28.0.1

• Fix: Safely absorb TimeoutException thrown after the file has fully uploaded/downloaded

28.0.0

• New: Progress reporting for synchronous methods Upload, Download, UploadFile and DownloadFile are now sent via delegates
• Fix: Correctly send progress for synchronous methods and retain IProgress for async methods

27.1.4

• Fix: Correctly assume Unix file listing parser for SunOS & Solaris servers
• Fix: Safely absorb TimeoutException thrown after the file has fully uploaded/downloaded

27.1.3

• New: Support detection of Sun OS Solaris FTP OS and server (allows for server specific commands)
• Fix: UploadFile fails when destination folder is empty on SunOS (550 error)

27.1.2

• Fix: Unable to upload files to OpenVMS servers if path contains numeric characters
• Fix: Assume FTP commands supported by OpenVMS HGFTP server if FEAT not supported
• FiX: Improve detection of OpenVMS absolute paths
• Fix: Connect & ConnectAsync throw ArgumentException when passing an incomplete FtpProfile

27.1.1

• New: Auto-detect the correct FTP listing parser when SYST command fails (IIS, Azure, OpenVMS)
• New: Assume FTP commands supported by OpenVMS HGFTP server
• FiX: Support edge case for OpenVMS absolute paths (directive can be alpha-numeric)

27.1.0

• New: Improved transfer rate throttling when using an upload/download speed limit (thanks wakabayashik)

27.0.3

• New: Support detection of XLight FTP server software (allows for server specific commands)
• New: Partial support for getting directory listing using STAT command (GetListing supports new FtpListOption.UseStat)
• Fix: GetFileSize always returns 0 instead of correct file size (thanks RadiatorTwo)

27.0.2

• Fix: FileExists and FileExistsAsync support switching to binary mode for servers that need it

27.0.1

• Fix: Error using BlueCoat proxy to an FTP server on a port other than port 21
• Fix: Error using UserAtHost proxy to an FTP server on a port other than port 21

27.0.0

• New: Change Capability API to return a list instead of bitwise enum (to support more than 32 distinct capabilities)
• New: Change custom parsers to take capabilities as a list instead of bitwise enum (to match client implementation)
• New: Support detection of FTP2S3 gateway server software (allows for server specific commands)
• New: Support detection of server-specific capabilities of Serv-U FTP Gateway
• New: Support RMDA command to quickly and recursively delete a directory from Serv-U FTP Gateway

26.0.2

• Fix: Improve performance of GetFileSize to only switch to Binary for servers that require it
• Fix: Ensure data type (ASCII/Binary) is correctly set during GetFileSize for servers that require it
• Fix: Ensure data type (ASCII/Binary) is correctly set for cloned connections
• Fix: Ensure data type (ASCII/Binary) is correctly set during GetListing and GetNameListing
• Fix: Reset server detection state flags whenever we connect to a server, to allow for reuse of FtpClient
• Fix: Copy server detection state flags to cloned connections to improve performance
• Fix: Retry GetListing if temporary error "Received an unexpected EOF or 0 bytes from the transport stream"

26.0.1

• Fix: Prefer using Passive/Active modes rather than Enhanced Active/Passive during auto-detection
• Fix: Some FTP servers do not open a port when listing an empty folder with GetNameListing
• Fix: Hard catch and suppress all exceptions during disposing to solve all random exceptions

26.0.0

• New: Automatic FTP connection negotiation using AutoConnect()
• New: Automatic detection of working FTP connection settings using AutoDetect()
• New: C# code generation of working connection settings using FtpProfile.ToCode()
• New: Support more capability detection commands: EPSV, CPSV, NOOP, CLNT, SSCN, SITE commands for ProFTPd
• New: Improve transfer performance by only attempting EPSV once and then never using it again for that connection
• New: Support MKDIR & RMDIR commands specially for ProFTPd to quickly create and delete a directory on the server-side
• New: Support PRET command before downloading or uploading files for servers like ProFTPd & DrFTPd
• New: Support detection of BFTPd server software (allows for server specific commands)
• Fix: When uploading files in FtpExists.NoCheck mode, file size check should not be done
• Fix: Some FTP servers do not open a port when listing an empty folder (thanks Mortens4444)
• Fix: OpenRead with EnableThreadSafeDataConnections always transfers in ASCII (thanks ts678)
• Refactor: Delete legacy static methods: OpenRead, OpenWrite, OpenAppend (dynamic versions still exist)
• Refactor: Move CalcChmod from FtpClient to FtpExtensions (as part of repository cleanup task)

25.0.6

• Fix: Async methods do not work with Active FTP mode and SSL/encryption (thanks Mortens4444)
• Fix: For OpenVMS absolute paths may not contain slashes but are still absolute (3rd revision)

25.0.5

• Fix: Divide-by-zero exceptions while calculating progress of file uploads/downloads

25.0.4

• Fix: Supress all exceptions when Disposing the underlying FtpSocketStream

25.0.3

• Fix: Received an unexpected EOF or 0 bytes from the transport stream (thanks mikemeinz)
• Fix: UploadFile() progress callback is not called if the file already exists on the server
• (.NET core) Fix: Connect() method sometimes causes the thread to hang indefinitely (thanks radiy)
• Fix: Regression of #288 where upload hangs with only a few bytes left (thanks cw-andrews)

25.0.1

• New: FtpAuthenticationException for authentication errors (thanks erik-wramner)
• New: Added support to detect Homegate FTP Server

25.0.0

• New: SSL Buffering is now switchable via the SslBuffering parameter
• Fix: SSL Buffering is automatically disabled when using FTP proxies, and enabled in all other cases
• Fix: Revert PR #383 as it was causing regression issues in SSL connectivity
• Fix: Disable automatic IP correction to fix connectivity issues via BlueCoat proxy servers (thanks CMIGIT)
• Refactor: Rename FtpClientUserAtHostProxyBlueCoat to FtpClientBlueCoatProxy
• Fix: For OpenVMS absolute paths may not contain slashes but are still absolute (2nd revision) (thanks tonyhawe)
• Fix: Detect file existence string "Can't find file" to fix FileExists check on some servers (thanks reureu)
• Fix: Feature parity between FileExists and FileExistsAsync methods, added support for FtpReply 550 check (thanks reureu)
• Fix: Feature parity between UploadFile and UploadFileAsync methods, added support for AppendNoCheck handling (thanks reureu)

24.0.0

• New: Get detailed progress information for uploads/downloads via the FtpProgress object (thanks n0ix)
• New: Get transfer speed and ETA (estimated time of arrival) for uploads/downloads (thanks n0ix)
• Fix: Files were uploaded in Write mode instead of Append mode when the exists mode is AppendNoCheck and we couldn't read the offset position (thanks @everbalovas)
• Fix: Swap SslStream and BufferedStream so proxied connections with FtpClientHttp11Proxy are to connect (thanks @rmja)

23.1.0

• New: Additional FTP Server software detection (HP NonStop/Tandem, GlobalScape EFT, Serv-U, Cerberus, CrushFTP, glFTPd)
• New: Assume capabilities for servers that don't support FEAT (wuFTPd)
• Fix: FileExists returns false if name listing is used and server lists filenames with the path
• Fix: For OpenVMS absolute paths may not contain slashes but are still absolute
• Fix: For Download() methods restartPosition should not be mandatory

23.0.0

• New: Ability to cancel all async methods via CancellationToken (thanks WolfspiritM)
• New: ReadTimeout is now honored by all async methods (thanks WolfspiritM)
• New: FTP Server operating system detection (Windows, Unix, VMS, IBM/OS400)
• (.NET core) Fix: GetListing blocking with no timeout (thanks WolfspiritM)
• (.NET core) Fix async methods by not using the the async read function (thanks WolfspiritM)

22.0.0

• New: Ability to resume a download via existsMode on DownloadFile() and DownloadFiles() (thanks n0ix)
• New: Ability to turn off checking for server capabilities using FEAT command (thanks nhh-softwarehuset)
• Fix: Add workaround if a server advertises a non-routeable IP in PASV Mode (thanks n0ix)
• Fix: Recursive directory deletion tries to delete the same file twice (because GetListing is also recursive)

21.0.0

• New: OnLogEvent callback to get logs in the context of indivivdual FtpClient connections
• Fix: All logging is done in the context of an FtpClient and then passed to FtpTrace listeners
• Signature for custom list parsers has changed, FtpClient argument added to the end

20.0.0

• New: FTP Server software detection (PureFTPd, VsFTPd, ProFTPD, FileZilla, OpenVMS, WindowsCE, WuFTPd)
• New: Detect if the FTP server supports recursive file listing (LIST -R) command using whitelist
• New: GetListing will manually recurse through directories if FtpListOption.Recursive is set and server does not support recursion
• New: Added LastReply property which returns the last FtpReply recieved from the server.
• New: Added new upload option AppendNoCheck to append to a file on the server without checking if it exists (thanks @everbalovas)
• Fix: During upload, respond to any error in 5xx series, not just 550 (thanks stengnath)
• Fix: Various fixes to UploadFileAsync based on fixes already implemented in UploadFile

19.2.4

• Fix: UploadFilesAsync with errorHandling deletes the entire directory instead of specific files
• Fix: Server responds to EPSV with 425 "Data connection failed" but connects with PASV (thanks ejohnsonTKTNET)
• Fix: Use proper async configuration for .NET Async methods (thanks ejohnsonTKTNET)
• Fix: Improve implementation of upload and download resuming in Async methods (thanks ejohnsonTKTNET)

19.2.3

• Fix: UploadFile() or UploadFiles() sometimes fails to create the remote directory if it doesn't exist
• Fix: DownloadDataType Binary value ignored on ASCII-configured FTP servers
• Performance improvement: Added BufferedStream between SslStream and NetworkStream (thanks stengnath)
• Fix: When the FTP server sends 550, transfer is received but not confirmed (thanks stengnath)
• Fix: Make Dispose method of FTPClient virtual (thanks @martinbu)
• Fix: OpenPassiveDataStream/Async() uses the target FTP host instead of the configured proxy (thanks @rmja)
• Fix: FileExists() for Xlight FTP Server (thanks @oldpepper)
• Fix: FTPD "550 No files found" when folder exists but is empty, only in PASV mode (thanks stengnath)
• Fix: Many unexpected EOF for remote file IOException on Android (thanks @jersiovic)
• Fix: Race condition when BeginInvoke calls the callback before the IAsyncResult is added (thanks stengnath)

19.2.2

• Fix: Prevent socket poll from hammering the server multiple times per second
• Fix: Allow using absolute paths that include drive letters (Windows servers)
• Performance improvement: Only change the FTP data type if different from required type
• Performance improvement: Download all files in EOF mode and skip the file size check, unless download progress is required
• Added all missing async versions of FTP methods to IFtpClient
• System: Certain core FTP socket handling operations have been changed to improve reliability & performance.

19.1.4

• Fix: Fix hang in TLS activation because no timeout is set on the underlying NetworkStream (thanks @iamjay)

19.1.3

• Added async versions of FTP methods to IFtpClient (thanks @peterfortuin)
• Fix: Fixes when ActivePorts is specified in active FTP mode (thanks @ToniMontana)
• Fix: Throw OperationCanceledException instead of FtpException when cancellation is requested (thanks taoyouh)

19.1.2

• Fix: Add support for checking if file exists on Serv-U FTP Server
• Fix: Make IFtpClient inherit from IDisposable (thanks @repl-andrew-ovens)
• (UWP) Fix: UWP does not allow File.Exists() to run in UI thread (thanks taoyouh)

19.1.1

• Fix: When downloading files in ASCII mode, file length is unreliable therefore we read until EOF
• Fix: When upload/download progress is indeterminate, send -1 instead of NaN or Infinity
• Fix: NetStream was not assigned in FtpSocketStream for .NET Standard in active FTP mode (thanks @ralftar)
• Fix: CurrentDataType was not set for ASCII transfers in DownloadFileAsync/UploadFileAsync (thanks taoyouh)
• Fix: Sometimes FtpSocketStream and FtpDataStream are not disposed in FtpSocketStream.Dispose (thanks taoyouh)

19.1.0

• New Progress reporting for UploadFile & DownloadFile methods via IProgress
• Fix: Stream.Position should not be set in UploadFileInternal unless supported

19.0.0

• New Task-based async methods for .NET Standard and .NET Fx 4.5 (thanks taoyouh)
• New async methods for UploadFile, DownloadFile, UploadFiles & DownloadFiles (thanks artiomchi)
• (UWP) Fix: FileNotFoundException with reference System.Console (thanks artiomchi)
• (.NET core) Fix: Thread suspends when calling UploadFile or DownloadFile (thanks artiomchi)
• (.NET core) Fix: File download hangs inconsistently when reading data from stream (thanks @artiomchi, bgroenks96)
• (.NET core) Fix: Stream does not dispose due to wrong handling of closing/disposing (thanks artiomchi)
• Fix: File upload EOS bug when calling Stream.Read (thanks bgroenks96, @artiomchi, @taoyouh)
• Fix: DownloadFileInternal not recognizing the download data type with EnableThreadSafeConnections (thanks bgroenks96)
• (Backend) Migrate to a single VS 2017 solution for all frameworks (thanks artiomchi)
• (Backend) Continuous Integration using AppVeyor (thanks artiomchi)

18.0.1

• Add IFtpClient interface to build unit tests upon main FtpClient class (thanks Kris0)
• Disposing FtpDataStream reads server reply and closes the underlying stream (thanks Lukazoid)

18.0.0

• New SetModifiedTime API to change modified date of a server file in local timezone/UTC
• Add type argument to GetModifiedTime, allowing for getting dates in UTC/Local timezone
• Breaking changes to Async API of GetModifiedTime (addition of type argument)
• GetModifiedTime and SetModifiedTime now honor the TimeOffset property in FtpClient
• Add checkIfFileExists to OpenRead, OpenAppend and OpenWrite to skip GetFileSize check
• Fix issue where InnerException is null during a file transfer (upload/download)
• Improve performance of typical uploads/downloads by skipping the extra file exists check

17.6.1

• Fix for CreateDirectory and DirectoryExists to allow null/blank input path values
• Fix for GetFtpDirectoryName to return correct parent folder of simple folder paths (thanks ww898)

17.6.0

• Add argument validation for missing/blank arguments in : Upload, Download, UploadFile(s), DownloadFile(s), GetObjectInfo, DeleteFile, DeleteDirectory, FileExists, DirectoryExists, CreateDirectory, Rename, MoveFile, MoveDirectory, SetFilePermissions, Chmod, GetFilePermissions, GetChmod, GetFileSize, GetModifiedTime, VerifyTransfer, OpenRead, OpenWrite, OpenAppend
• Disable all async methods on .NET core due to persistant PlatformUnsupported exception (if you need async you are free to contribute a non-blocking version of the methods)

17.5.9

• Increase performance of GetListing by reading multiple lines at once (BulkListing property, thanks sierrodc)

17.5.8

• Add support for parsing AS400 listings inside a file (5 fields) (thanks rharrisxtheta)
• Retry interpreting file listings after encountered invalid date format (thanks rharrisxtheta)
• Always switch into binary mode when running SIZE command (thanks rharrisxtheta)

17.5.7

• Honor UploadDataType and DownloadDataType in all sync/async cases (thanks rharrisxtheta)
• Force file transfers in BINARY mode for known 0 byte files (thanks rharrisxtheta)
• Allow file transfers in ASCII mode if the server doesn't support the SIZE command (thanks rharrisxtheta)

17.5.6

• Fix NullReferenceException when arguments are null during FtpTrace.WriteFunc

17.5.5

• Remove internal locking for .NET Standard 1.4 version since unsupported on UWP

17.5.4

• Remove dependency on System.Threading.Thread for .NET Standard 1.4 version (for UWP)

17.5.3

• Allow transferring files in ASCII/Binary mode with the high-level API (UploadDataType, DownloadDataType)

17.5.2

• Add support for .NET 3.5 and .NET Standard 1.4 (supports Universal Windows Platform 10.0)

17.5.1

• Add FtpTrace.LogToConsole and LogToFile to control logging in .NET core version

17.5.0

• Add PlainTextEncryption API to support FTPS servers and plain-text FTP firewalls (CCC command)
• FluentFTP now uses unsafe code to support the CCC command (inside FtpSslStream)
• If you need a "non unsafe" version of the library please add an issue

17.4.4

• Add logging for high-level function calls to improve remote debugging (FtpTrace.LogFunctions)
• Add settings to hide sensitive data from logs (FtpTrace.LogIP, LogUserName, LogPassword)
• Add RecursiveList to control if recursive listing should be used
• Auto-detect Windows CE and disable recursive listing during DeleteDirectory()

17.4.2

• Add UploadRateLimit and DownloadRateLimit to control the speed of data transfer (thanks Danie-Brink)

17.4.1

• Fix parsing of LinkTarget during GetListing() on Unix FTP servers
• Improve logging clarity by removing "FluentFTP" prefix in TraceSource

17.4.0

• Add MoveFile() and MoveDirectory() to move files and directories safely

17.3.0

• Automatically verify checksum of a file after upload/download (thanks jblacker)
• Configurable error handling (abort/throw/ignore) for file transfers (thanks jblacker)
• Multiple log levels for tracing/logging debug output in FtpTrace (thanks jblacker)

17.2.0

• Simplify DeleteDirectory() API - the force and fastMode args are no longer required
• DeleteDirectory() is faster since it uses one recursive file listing instead of many
• Remove .NET Standard 1.4 to improve nuget update reliability, since we need 1.6 anyway

17.1.0

• Split stream API into Upload()/UploadFile() and Download()/DownloadFile()

17.0.0

• Greatly improve performance of FileExists() and GetNameListing()
• Add new OS-specific directory listing parsers to GetListing() and GetObjectInfo()
• Support GetObjectInfo() even if machine listings are not supported by the server
• Add existsMode to UploadFile() and UploadFiles() allowing for skip/overwrite and append
• Remove all usages of string.Format to fix reliability issues caused with UTF filenames
• Fix issue of broken files when uploading/downloading through a proxy (thanks Zoltan666)
• GetReply() is now public so users of OpenRead/OpenAppend/OpenWrite can call it after

16.5.0

• Add async/await support to all methods for .NET 4.5 and onwards (thanks jblacker)

16.4.0

• Support for .NET Standard 1.4 added.

16.2.5

• Add UploadFiles() and DownloadFiles() which is faster than single file transfers
• Allow disabling UTF mode using DisableUTF8 API

16.2.4

• First .NET Core release (DNXCore5.0) using Visual Studio 2017 project and shared codebase.
• Support for .NET 2.0 also added with shims for LINQ commands needed.

16.2.1

• Add FtpListOption.IncludeSelfAndParent to GetListing

16.1.0

• Use streams during upload/download of files to improve performance with large files

16.0.18

• Support for uploading/downloading to Streams and byte[] with UploadFile() and DownloadFile()

16.0.17

• Added high-level UploadFile() and DownloadFile() API. Fixed some race conditions.

16.0.14

• Added support for FTP proxies using HTTP 1.1 and User@Host modes. (thanks L3Z4)