SocketTaskExtensions Class is not supported on .Net Framework 4.6.2

FTP Server OS: Windows

FTP Server Type: Windows Server IIS

Client Computer OS: Windows

FluentFTP Version: 4.2

Framework: .NET 4.6.2

.Net 4.6.2 does not support SocketTaskExtensions so it fails to compile.

The problem is in Streams\FtpSocketStream.cs

The following method fixes.

	/// <summary>
		/// Connect to the specified host
		/// Detects timeout and throws that explicitly
		/// </summary>
		/// <param name="ipad">The ip address to connect to</param>
		/// <param name="port">The port to connect to</param>
		private async Task<bool> ConnectAsyncHelper(IPAddress ipad, int port, CancellationToken token) {

			int ctmo = this.ConnectTimeout;

#if NETSTANDARD
			try {
				using (var timeoutSrc = CancellationTokenSource.CreateLinkedTokenSource(token)) {
					timeoutSrc.CancelAfter(ctmo);
					await EnableCancellation(m_socket.ConnectAsync(ipad, port), timeoutSrc.Token, () => DisposeSocket());
				}
			}
			catch (SocketException ex) {
				if (ex.SocketErrorCode == SocketError.OperationAborted ||
					ex.SocketErrorCode == SocketError.TimedOut) {
					throw new TimeoutException("Timed out trying to connect!");
				}
				throw;
			}
#else
			 try {
#if v472
				 
				    using (var timeoutSrc = CancellationTokenSource.CreateLinkedTokenSource(token)) {
					timeoutSrc.CancelAfter(ctmo);

                    await EnableCancellation(m_socket.ConnectAsync(ipad, port), timeoutSrc.Token, () => DisposeSocket());
					}
#else
				using (var timeoutSrc = CancellationTokenSource.CreateLinkedTokenSource(token)) {
					timeoutSrc.CancelAfter(ctmo);
					var connectResult = m_socket.BeginConnect(ipad, port, null, null);
					await EnableCancellation(Task.Factory.FromAsync(connectResult, m_socket.EndConnect), timeoutSrc.Token, () => DisposeSocket());
				}
#endif
			}
			catch (SocketException ex) {
				if (ex.SocketErrorCode == SocketError.OperationAborted ||
					ex.SocketErrorCode == SocketError.TimedOut) {
					throw new TimeoutException("Timed out trying to connect!");
				}
				throw;
			}
			catch (ObjectDisposedException ex) {
				throw new TimeoutException("Timed out trying to connect!");
			}
#endif
					return m_socket.Connected;
		}

[FanDjango]

@sandra-dcs Please see PR #1056.

Question: Do you believe a change to MoveFile(...) like yours, is an enhancement we should include?

[FanDjango]

Released as V42.1.0