While uploading file using WinSCP .NET library following error occurred:
    
Error Exception :Error deleting file 'myFiles'. After resumable file upload the existing destination file must be deleted. If you do not have permissions to delete file destination file, you need to disable resumable file transfers.
General failure (server should provide error description).
Error code: 4
Error message from server: Failure    
Bellow is my code
    using (Session session = new Session())
{
    session.Open(sessionOptions);
 
    Console.WriteLine("Connection Successful...");
 
    RemoteDirectoryInfo directoryInfo = session.ListDirectory("/");
 
    // Upload files
    TransferOptions transferOptions = new TransferOptions();
    transferOptions.TransferMode = TransferMode.Binary;
    TransferOperationResult transferResult;
 
    if (File.Exists(stFileName))
    {
        transferResult = session.PutFiles(stFileName, RemoteFolderPath, false, transferOptions);
 
        // Throw on any error
        transferResult.Check();
 
        // Print results
        foreach (TransferEventArgs transfer in transferResult.Transfers)
        {
            Console.WriteLine("Upload of {0} succeeded", transfer.FileName);
        }
    }
    else
    {
        Console.WriteLine("File not found : " + stFileName);
    }
}