hello all i have the following piece of code, that im looking forward to optimize, since i'm consuming gobs of memory this routine is heavily used

first optimization would be to move the stringbuilder construction out of the download routine and make it a field of the class, then i would clear it inside the routine

can you please suggest any other optimization or point me in the direction of some resources that could help me with this (web articles, books, etc).

i'm thinking about replacing the stringbuilder by a fixed (much larger) size buffer ... or perhaps create a larger sized stringbuilder

thanks in advance.

   StreamWriter _writer;
   StreamReader _reader;

   public string Download(string msgId)
   {
       _writer.WriteLine("BODY <" + msgId + ">");
       string response = _reader.ReadLine();

       if (!response.StartsWith("222"))
           return null;

       bool done = false;
       StringBuilder body = new StringBuilder(256* 1024);
       do
       {
           response = _reader.ReadLine();

           if (OnProgress != null)
               OnProgress(response.Length);

           if (response == ".")
           {
               done = true;
           }
           else 
           {
               if (response.StartsWith(".."))
                   response = response.Remove(0, 1);

               body.Append(response);
               body.Append("\r\n");
           }
       } while (!done);

       return body.ToString();
   }