Uploading files to FTP using .NET

public void Upload(string filename, string host, string username, string password)
{
FileInfo fileInf = new FileInfo(filename);
string uri = "ftp://" + host + "/" + fileInf.Name;
FtpWebRequest reqFTP = default(FtpWebRequest);

// Create FtpWebRequest object from the Uri provided
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + host + "/" + fileInf.Name));

// Provide the WebPermission Credintials
reqFTP.Credentials = new NetworkCredential(username, password);

// By default KeepAlive is true, where the control connection is not closed
// after a command is executed.
reqFTP.KeepAlive = false;

// Specify the command to be executed.
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

// Specify the data transfer type.
reqFTP.UseBinary = true;

// Notify the server about the size of the uploaded file
reqFTP.ContentLength = fileInf.Length;

// The buffer size is set to 2kb
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen = 0;

// Opens a file stream (System.IO.FileStream) to read the file to be uploaded
FileStream fs = fileInf.OpenRead();

try
{
// Stream to which the file to be upload is written
Stream strm = reqFTP.GetRequestStream();

// Read from the file stream 2kb at a time
contentLen = fs.Read(buff, 0, buffLength);

// Till Stream content ends
while (contentLen != 0)
{
// Write Content from the file stream to the FTP Upload Stream
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
}

// Close the file stream and the Request Stream
strm.Close();
fs.Close();


}

catch (Exception ex)
{
MessageBox.Show(ex.Message, "Upload Error");
}
}

Use the above function with appropriate values