How do I upload a file on remote server?

File.copy(src, dest);

public void ftpfile(string ftpfilepath, string inputfilepath)  
{  
    string ftphost = "127.0.0.1";  
    //here correct hostname or IP of the ftp server to be given  

    string ftpfullpath = "ftp://" + ftphost + ftpfilepath;  
    FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(ftpfullpath);  
    ftp.Credentials = new NetworkCredential("userid", "password");  
    //userid and password for the ftp server to given  

    ftp.KeepAlive = true;  
    ftp.UseBinary = true;  
    ftp.Method = WebRequestMethods.Ftp.UploadFile;  
    FileStream fs = File.OpenRead(inputfilepath);  
    byte[] buffer = new byte[fs.Length];  
    fs.Read(buffer, 0, buffer.Length);  
    fs.Close();  
    Stream ftpstream = ftp.GetRequestStream();  
    ftpstream.Write(buffer, 0, buffer.Length);  
    ftpstream.Close();  
}