C# Web Service File Transfer

http://articles.techrepublic.com.com/5100-10878_11-5805105.html

using System;
using System.Web.Services;
using System.Xml.Serialization;
using System.IO;

[WebService(Namespace="http://someplace.com/FileIO/")]
public class FileRW : WebService {

    [WebMethod]
    public byte[] GetFile(string filename) {
        BinaryReader binReader = new
 BinaryReader(File.Open(Server.MapPath(filename), FileMode.Open,
 FileAccess.Read));
        binReader.BaseStream.Position = 0;
        byte[] binFile =
 binReader.ReadBytes(Convert.ToInt32(binReader.BaseStream.Length));
        binReader.Close();
        return binFile;
    }

    [WebMethod]
    public void PutFile(byte[] buffer, string filename) {
        BinaryWriter binWriter = new
 BinaryWriter(File.Open(Server.MapPath(filename), FileMode.CreateNew,
 FileAccess.ReadWrite));
        binWriter.Write(buffer);
        binWriter.Close();
    }
}