Getting data from host, convert to string and then to bytes

Question

Hi.

I want to make a program to download files from a remote host.

So what i do is to send throw sockets all the binary information + a string used as end "mystyring".

To check if i have to continue writing the buffer to the file i first convert all to string, so if i find "mystring" it will finish, if not, i reconvert all to bytes and i copy data.

The problem im having is that, .txt files are writed well, but binaris not, it always show error at opening. I ve tried copying a pdf, and when i open it show all the pages, but in blank :S. Also if i check the size of the original file is always some bytes bigger than the copy.

[CODE]FileStream fs = new FileStream("C:\\Users\\Mauri\\Desktop\\" + item.Name, FileMode.Append, FileAccess.Write);

            BinaryWriter writer = new BinaryWriter(fs);

            bool continua = true;

            while (continua)

            {

                recibido = getSocket(numsock).socketRecv(); // This return the data converted to string.

                words = recibido.Split('|'); //We split "|mystring" to find the end of file.

                foreach (string s in words)

                {

                    if ((String.Compare(s, "mystring") != 0))                        

                        writer.Write(StringToBytes(s)); // Write converted data. 

                    else

                        continua = false; // if we find "mystring", end the action.

                }   

            }

            writer.Close();

            fs.Close();

// Convert string to bytes

public byte[] StringToBytes(String cadena)

        {

            System.Text.ASCIIEncoding codificador = new System.Text.ASCIIEncoding();

            return codificador.GetBytes(cadena);

        }

[/CODE]

The strange thing is that .txt files are writed correctly.

Thanks