Cannot upload files using C#

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J22
Guest

Cannot upload files using C#

I guess I did everything as mentioned here https://winscp.net/eng/docs/library_install
"By default it looks for the winscp.exe in the same folder, where the assembly is stored. For that reason, you should extract the package into the same folder, where you have WinSCP installed/extracted. You can also copy all binaries, winscp.exe and winscpnet.dll, into separate folder. "
My code:

FtpMode mode = passiveMode ? FtpMode.Passive : FtpMode.Active;
                SessionOptions sessionOptions = new SessionOptions
                {
                    Protocol = Protocol.Ftp,
                    HostName = hostname,
                    UserName = ftpUsername,
                    Password = ftpPassword,
                    FtpMode = mode,
                    Timeout = new TimeSpan(0, 5, 0)
                };
                using (Session session = new Session())
                {
                    session.ReconnectTime = new TimeSpan(0, 2, 0);
                    string mainDir = Path.GetDirectoryName(System.Reflection.Assembly.GetEntryAssembly().Location);
                    string logPath = Path.Combine(mainDir, "ftp.log");
                    string xmlLogPath = Path.Combine(mainDir, "ftp.xml");
                    session.DebugLogPath = logPath;
                    session.XmlLogPath = xmlLogPath;
                    session.Open(sessionOptions);


                    TransferOptions transferOptions = new TransferOptions();
                    transferOptions.TransferMode = TransferMode.Binary;

                    TransferOperationResult transferResult;

                    transferResult = session.PutFiles(file, destFileName, false, transferOptions);

                    transferResult.Check();
...    

Only when there IS an application WinSCP.exe in the directory, the code doesn't work: there is one of these two errors thrown
1) Configured temporary file D:\Export\ftp.xml already exists
2) Error transferring file 'C:\Windows\TEMP\tmpEC19.tmp'.
Without the app in the directory everyhthing works fine.

Thanks in advance for help.

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