C#

public void Upload(string filename)
{
    FileInfo fileInf = new FileInfo(filename);
    string uri = "ftp://127.0.0.1";
    FtpWebRequest reqFTP;
    reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
    reqFTP.Credentials = new NetworkCredential(m_userName, m_password);
    reqFTP.KeepAlive =true;
    reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
    reqFTP.UseBinary = true;
    reqFTP.ContentLength = fileInf.Length;

    int buffLength = 2048;
    byte[] buff = new byte[buffLength];
    int contentLen;
    FileStream fs = fileInf.OpenRead();
    try
    {
        Stream strm = reqFTP.GetRequestStream();
        contentLen = fs.Read(buff, 0, buffLength);
        while (contentLen != 0)
        {
            strm.Write(buff, 0, contentLen);
            contentLen = fs.Read(buff, 0, buffLength);
        }
        strm.Close();
        fs.Close();
    }
    catch (Exception ex)
    { 
    //...
    }
}

Byte[] received = new Byte[256];
int bytesReceived = server1Tcp.Receive(input, input.Length, 0);
dataReceived = System.Text.Encoding.ASCII.GetString(input);