HttpServer.HttpRequest.AddHeader C# (CSharp) Method

        public void AddHeader(string name, string value)
        {
            if (string.IsNullOrEmpty(name))
                throw new BadRequestException("Invalid header name: " + name ?? "<null>");
            if (string.IsNullOrEmpty(value))
                throw new BadRequestException("Header '" + name + "' do not contain a value.");

            switch (name.ToLower())
            {
                case "http_x_requested_with":
                case "x-requested-with":
                    if (string.Compare(value, "XMLHttpRequest", true) == 0)
                        _isAjax = true;
                    break;
                case "accept":
                    _acceptTypes = value.Split(',');
                    for (int i = 0; i < _acceptTypes.Length; ++i)
                        _acceptTypes[i] = _acceptTypes[i].Trim();
                    break;
                case "content-length":
                    int t;
                    if (!int.TryParse(value, out t))
                        throw new BadRequestException("Invalid content length.");
                    ContentLength = t;
                    break; //todo: mayby throw an exception
                case "host":
                    try
                    {
                        _uri = new Uri(Secure ? "https://" : "http://" + value + _uriPath);
                        _uriParts = _uri.AbsolutePath.Split(UriSplitters, StringSplitOptions.RemoveEmptyEntries);
                    }
                    catch (UriFormatException err)
                    {
                        throw new BadRequestException("Failed to parse uri: " + value + _uriPath, err);
                    }
                    break;
                case "connection":
                    if (string.Compare(value, "close", true) == 0)
                        Connection = ConnectionType.Close;
                    else if (value.StartsWith("keep-alive", StringComparison.CurrentCultureIgnoreCase))
                        Connection = ConnectionType.KeepAlive;
                    else
                        throw new BadRequestException("Unknown 'Connection' header type.");
                    break;

                default:
                    _headers.Add(name, value);
                    break;
            }
        }

 /// <summary>
 ///
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 protected virtual void OnHeaderReceived(object sender, HeaderEventArgs e)
 {
     if (string.Compare(e.Name, "expect", true) == 0 && e.Value.Contains("100-continue"))
     {
         lock (requestsInServiceIDs)
         {
             if (requestsInServiceIDs.Count == 0)
             {
                 Respond("HTTP/1.1", HttpStatusCode.Continue, "Please continue.");
             }
         }
     }
     m_currentRequest.AddHeader(e.Name, e.Value);
 }