static void ProcessHttpClient(object obj)//请求处理
    {
        HttpListenerContext context   = obj as HttpListenerContext;
        HttpListenerRequest request   = context.Request;
        HttpListenerResponse response = context.Response;        try
        {
            StreamReader streamReader = new StreamReader(request.InputStream); 
            string Instr = streamReader.ReadToEnd();             streamReader.Close();
            request.InputStream.Close();            byte[] buffer = System.Text.Encoding.UTF8.GetBytes("");            response.ContentType     = "POST";
            response.ContentLength64 = buffer.Length;            response.OutputStream.Write(buffer, 0, buffer.Length);
        }
        catch
        {}
        finally
        {
            response.OutputStream.Close();
            response.Close();
        }
    }在上面的代码中,如果response.OutputStream.Write时出错,
就会执行finally中的 response.OutputStream.Close();
但是出现Cannot close stream until all bytes are written,怎么避免这种错误。