压缩包 : 37724111lumisoft.net.zip 列表
Net/docs/
Net/docs/dns/
Net/docs/dns/dns_records.jpg
Net/docs/dns/dns_records.vsd
Net/donate.txt
Net/license.txt
Net/Net/
Net/Net/AssemblyInfo.cs
Net/Net/AUTH/
Net/Net/AUTH/AuthHelper.cs
Net/Net/AUTH/AuthType.cs
Net/Net/AUTH/Auth_HttpDigest.cs
Net/Net/AUTH/Auth_HttpDigest_NonceManager.cs
Net/Net/AUTH/SaslAuthTypes.cs
Net/Net/BalanceMode.cs
Net/Net/bin/
Net/Net/BindInfoProtocol.cs
Net/Net/bin/Debug/
Net/Net/bin/Debug/LumiSoft.Net.dll
Net/Net/bin/Debug/LumiSoft.Net.pdb
Net/Net/bin/Debug/LumiSoft.Net.xml
Net/Net/bin/Debug/vs2E3.tmp
Net/Net/bin/Release/
Net/Net/bin/Release/LumiSoft.Net.dll
Net/Net/bin/Release/LumiSoft.Net.xml
Net/Net/CircleCollection.cs
Net/Net/Codec/
Net/Net/Codec/G711.cs
Net/Net/Data/
Net/Net/Data/DbFile.cs
Net/Net/Data/LDB_DataColumn.cs
Net/Net/Data/LDB_DataColumnCollection.cs
Net/Net/Data/LDB_DataType.cs
Net/Net/Data/LDB_Record.cs
Net/Net/Data/lsDB_FixedLengthRecord.cs
Net/Net/Data/lsDB_FixedLengthTable.cs
Net/Net/Data/_DataPage.cs
Net/Net/Data/_ldb_Utils.cs
Net/Net/DNS/
Net/Net/DNS/Client/
Net/Net/DNS/Client/DnsCache.cs
Net/Net/DNS/Client/DnsServerResponse.cs
Net/Net/DNS/Client/DNS_Client.cs
Net/Net/DNS/Client/DNS_rr_A.cs
Net/Net/DNS/Client/DNS_rr_AAAA.cs
Net/Net/DNS/Client/DNS_rr_base.cs
Net/Net/DNS/Client/DNS_rr_CNAME.cs
Net/Net/DNS/Client/DNS_rr_HINFO.cs
Net/Net/DNS/Client/DNS_rr_MX.cs
Net/Net/DNS/Client/DNS_rr_NAPTR.cs
Net/Net/DNS/Client/DNS_rr_NS.cs
Net/Net/DNS/Client/DNS_rr_PTR.cs
Net/Net/DNS/Client/DNS_rr_SOA.cs
Net/Net/DNS/Client/DNS_rr_SRV.cs
Net/Net/DNS/Client/DNS_rr_TXT.cs
Net/Net/DNS/Client/QTYPE.cs
Net/Net/DNS/Client/RCODE.cs
Net/Net/DNS/Client/_OPCODE.cs
Net/Net/FTP/
Net/Net/FTP/Client/
Net/Net/FTP/Client/FTP_Client.cs
Net/Net/FTP/Client/FTP_ClientException.cs
Net/Net/FTP/FTP_ListItem.cs
Net/Net/FTP/FTP_TransferMode.cs
Net/Net/FTP/Server/
Net/Net/FTP/Server/AuthUser_EventArgs.cs
Net/Net/FTP/Server/FileSysEntry_EventArgs.cs
Net/Net/FTP/Server/FTP_Server.cs
Net/Net/FTP/Server/FTP_Session.cs
Net/Net/FTP/Server/readme.txt
Net/Net/HostEndPoint.cs
Net/Net/HTTP/
Net/Net/HTTP/Server/
Net/Net/HTTP/Server/HTTP_Server.cs
Net/Net/HTTP/Server/HTTP_Session.cs
Net/Net/ICMP/
Net/Net/ICMP/Icmp.cs
Net/Net/IMAP/
Net/Net/IMAP/Client/
Net/Net/IMAP/Client/IMAP_Acl.cs
Net/Net/IMAP/Client/IMAP_Client.cs
Net/Net/IMAP/Client/IMAP_ClientException.cs
Net/Net/IMAP/Client/IMAP_FetchItem.cs
Net/Net/IMAP/Client/IMAP_FetchItem_Flags.cs
Net/Net/IMAP/Client/IMAP_Namespace.cs
Net/Net/IMAP/Client/IMAP_NamespacesInfo.cs
Net/Net/IMAP/Client/IMAP_Quota.cs
Net/Net/IMAP/IMAP_ACL_Flags.cs
Net/Net/IMAP/IMAP_BODY.cs
Net/Net/IMAP/IMAP_BODY_Entity.cs
Net/Net/IMAP/IMAP_Envelope.cs
Net/Net/IMAP/IMAP_Flags_SetType.cs
Net/Net/IMAP/IMAP_MessageFlags.cs
Net/Net/IMAP/IMAP_SequenceSet.cs
Net/Net/IMAP/Server/
Net/Net/IMAP/Server/AuthUser_EventArgs.cs
Net/Net/IMAP/Server/Folder_EventArgs.cs
Net/Net/IMAP/Server/IMAP_eArgs_DELETEACL.cs
Net/Net/IMAP/Server/IMAP_eArgs_GETACL.cs
Net/Net/IMAP/Server/IMAP_eArgs_GetMessagesInfo.cs
Net/Net/IMAP/Server/IMAP_eArgs_GetQuota.cs
Net/Net/IMAP/Server/IMAP_eArgs_GetUserACL.cs
Net/Net/IMAP/Server/IMAP_eArgs_MessageItems.cs
Net/Net/IMAP/Server/IMAP_eArgs_Search.cs
Net/Net/IMAP/Server/IMAP_eArgs_SETACL.cs
Net/Net/IMAP/Server/IMAP_Folder.cs
Net/Net/IMAP/Server/IMAP_Folders.cs
Net/Net/IMAP/Server/IMAP_Message.cs
Net/Net/IMAP/Server/IMAP_MessageCollection.cs
Net/Net/IMAP/Server/IMAP_MessageItems_enum.cs
Net/Net/IMAP/Server/IMAP_SearchGroup.cs
Net/Net/IMAP/Server/IMAP_SearchKey.cs
Net/Net/IMAP/Server/IMAP_SearchMatcher.cs
Net/Net/IMAP/Server/IMAP_SelectedFolder.cs
Net/Net/IMAP/Server/IMAP_Server.cs
Net/Net/IMAP/Server/IMAP_Session.cs
Net/Net/IMAP/Server/IMAP_Utils.cs
Net/Net/IMAP/Server/Message_EventArgs.cs
Net/Net/IMAP/Server/SharedRootFolders_EventArgs.cs
Net/Net/IMAP/Server/_FetchHelper.cs
Net/Net/IO/
Net/Net/IO/Base64Stream.cs
Net/Net/IO/DataSizeExceededException.cs
Net/Net/IO/IncompleteDataException.cs
Net/Net/IO/LineSizeExceededException.cs
Net/Net/IO/MultiStream.cs
Net/Net/IO/PartialStream.cs
Net/Net/IO/SizeExceededAction.cs
Net/Net/IO/SmartStream.cs
Net/Net/IPBindInfo.cs
Net/Net/JunkingStream.cs
Net/Net/Log/
Net/Net/Log/LogEntry.cs
Net/Net/Log/LogEntryType.cs
Net/Net/Log/Logger.cs
Net/Net/Log/WriteLogEventArgs.cs
Net/Net/LumiSoft.Net
Net/Net/LumiSoft.Net.xml
Net/Net/Mail/
Net/Net/Mail/Header/
Net/Net/Mail/Mail_Message.cs
Net/Net/MIME/
Net/Net/MIME/Header/
Net/Net/MIME/Header/MIME_HeaderField.cs
Net/Net/MIME/Header/MIME_HeaderFieldCollection.cs
Net/Net/MIME/Header/MIME_HeaderFieldParameter.cs
Net/Net/MIME/Header/MIME_HeaderFieldParameterCollection.cs.cs
Net/Net/MIME/Header/MIME_HeaderFieldValue.cs
Net/Net/MIME/Header/MIME_t_ContentDisposition.cs
Net/Net/MIME/Header/MIME_t_ContentType.cs
Net/Net/MIME/MIME_BinaryBody.cs
Net/Net/MIME/MIME_Body.cs
Net/Net/MIME/MIME_Entity.cs
Net/Net/MIME/MIME_EntityCollection.cs
Net/Net/MIME/MIME_Message.cs
Net/Net/MIME/MIME_MultipartBody.cs
Net/Net/MIME/MIME_MultipartEncryptedBody.cs
Net/Net/MIME/MIME_MultipartSignedBody.cs
Net/Net/MIME/MIME_TextBody.cs
Net/Net/MIME/MIME_Utils.cs
Net/Net/MIME/Old/
Net/Net/MIME/Old/Address.cs
Net/Net/MIME/Old/AddressList.cs
Net/Net/MIME/Old/ContentDisposition_enum.cs
Net/Net/MIME/Old/ContentTransferEncoding_enum.cs
Net/Net/MIME/Old/GroupAddress.cs
Net/Net/MIME/Old/HeaderField.cs
Net/Net/MIME/Old/HeaderFieldCollection.cs
Net/Net/MIME/Old/HeaderFieldParameter.cs
Net/Net/MIME/Old/HeaderFieldParameterCollection.cs
Net/Net/MIME/Old/MailboxAddress.cs
Net/Net/MIME/Old/MailboxAddressCollection.cs
Net/Net/MIME/Old/MediaType_enum.cs
Net/Net/MIME/Old/Mime.cs
Net/Net/MIME/Old/MimeEntity.cs
Net/Net/MIME/Old/MimeEntityCollection.cs
Net/Net/MIME/Old/MimeUtils.cs
Net/Net/MIME/Old/ParametizedHeaderField.cs
Net/Net/Net.csproj
Net/Net/Net.csproj.user
Net/Net/Net.sln
Net/Net/Net.suo
Net/Net/Net_Core.cs
Net/Net/Net_Utils.cs
Net/Net/NNTP/
Net/Net/NNTP/Client/
Net/Net/NNTP/Client/NNTP_Client.cs
Net/Net/POP3/
Net/Net/POP3/Client/
Net/Net/POP3/Client/POP3_Client.cs
Net/Net/POP3/Client/POP3_ClientException.cs
Net/Net/POP3/Client/POP3_ClientMessage.cs
Net/Net/POP3/Client/POP3_ClientMessageCollection.cs
Net/Net/POP3/POP3_ExtendedCapabilities.cs
Net/Net/POP3/Server/
Net/Net/POP3/Server/AuthUser_EventArgs.cs
Net/Net/POP3/Server/GetMessagesInfo_EventArgs.cs
Net/Net/POP3/Server/POP3_eArgs_GetMessageStream.cs
Net/Net/POP3/Server/POP3_Message.cs
Net/Net/POP3/Server/POP3_MessageCollection.cs
Net/Net/POP3/Server/POP3_Message_EventArgs.cs
Net/Net/POP3/Server/POP3_Server.cs
Net/Net/POP3/Server/POP3_Session.cs
Net/Net/PortRange.cs
Net/Net/RTP/
Net/Net/RTP/RTCP_CompoundPacket.cs
Net/Net/RTP/RTCP_Packet.cs
Net/Net/RTP/RTCP_PacketType.cs
Net/Net/RTP/RTCP_Packet_APP.cs
Net/Net/RTP/RTCP_Packet_BYE.cs
Net/Net/RTP/RTCP_Packet_RR.cs
Net/Net/RTP/RTCP_Packet_SDES.cs
Net/Net/RTP/RTCP_Packet_SDES_Chunk.cs
Net/Net/RTP/RTCP_Packet_SR.cs
Net/Net/RTP/RTCP_Packet_SR_ReportBlock.cs
Net/Net/RTP/RTP_Packet.cs
Net/Net/RTP/RTP_PacketEventArgs.cs
Net/Net/RTP/RTP_Participant.cs
Net/Net/RTP/RTP_ParticipantCollection.cs
Net/Net/RTP/RTP_ParticipantEventArgs.cs
Net/Net/RTP/RTP_PayloadType.cs
Net/Net/RTP/RTP_Receiver.cs
Net/Net/RTP/RTP_ReceiveStream.cs
Net/Net/RTP/RTP_ReceiveStreamCollection.cs
Net/Net/RTP/RTP_SendStream.cs
Net/Net/RTP/RTP_SendStreamCollection.cs
Net/Net/RTP/RTP_Session.cs
Net/Net/RTP/RTP_SourceDescription.cs
Net/Net/RTP/RTP_Utils.cs
Net/Net/SDP/
Net/Net/SDP/SDP.cs
Net/Net/SDP/SDP_Attribute.cs
Net/Net/SDP/SDP_ConnectionData.cs
Net/Net/SDP/SDP_Media.cs
Net/Net/SDP/SDP_MediaDescription.cs
Net/Net/SDP/SDP_Time.cs
Net/Net/ServersCore/
Net/Net/ServersCore/commonDelegates.cs
Net/Net/ServersCore/Error_EventArgs.cs
Net/Net/ServersCore/SocketBufferedWriter.cs
Net/Net/ServersCore/ValidateIP_EventArgs.cs
Net/Net/SIP/
Net/Net/SIP/Client/
Net/Net/SIP/Client/SIP_Client.cs
Net/Net/SIP/Message/
Net/Net/SIP/Message/SIP_HeaderField.cs
Net/Net/SIP/Message/SIP_HeaderFieldCollection.cs
Net/Net/SIP/Message/SIP_Message.cs
Net/Net/SIP/Message/SIP_MultiValueHF.cs
Net/Net/SIP/Message/SIP_MVGroupHFCollection.cs
Net/Net/SIP/Message/SIP_OptionTags.cs
Net/Net/SIP/Message/SIP_Parameter.cs
Net/Net/SIP/Message/SIP_ParameterCollection.cs
Net/Net/SIP/Message/SIP_ParseException.cs
Net/Net/SIP/Message/SIP_SingleValueHF.cs
Net/Net/SIP/Message/SIP_SVGroupHFCollection.cs
Net/Net/SIP/Message/SIP_t_AcceptRange.cs
Net/Net/SIP/Message/SIP_t_ACValue.cs
Net/Net/SIP/Message/SIP_t_AddressParam.cs
Net/Net/SIP/Message/SIP_t_AlertParam.cs
Net/Net/SIP/Message/SIP_t_AuthenticationInfo.cs
Net/Net/SIP/Message/SIP_t_CallID.cs
Net/Net/SIP/Message/SIP_t_Challenge.cs
Net/Net/SIP/Message/SIP_t_ContactParam.cs
Net/Net/SIP/Message/SIP_t_ContentCoding.cs
Net/Net/SIP/Message/SIP_t_ContentDisposition.cs
Net/Net/SIP/Message/SIP_t_Credentials.cs
Net/Net/SIP/Message/SIP_t_CSeq.cs
Net/Net/SIP/Message/SIP_t_Directive.cs
Net/Net/SIP/Message/SIP_t_Encoding.cs
Net/Net/SIP/Message/SIP_t_ErrorUri.cs
Net/Net/SIP/Message/SIP_t_Event.cs
Net/Net/SIP/Message/SIP_t_EventType.cs
Net/Net/SIP/Message/SIP_t_From.cs
Net/Net/SIP/Message/SIP_t_HiEntry.cs
Net/Net/SIP/Message/SIP_t_IdentityInfo.cs
Net/Net/SIP/Message/SIP_t_Info.cs
Net/Net/SIP/Message/SIP_t_Join.cs
Net/Net/SIP/Message/SIP_t_Language.cs
Net/Net/SIP/Message/SIP_t_LanguageTag.cs
Net/Net/SIP/Message/SIP_t_Method.cs
Net/Net/SIP/Message/SIP_t_MinSE.cs
Net/Net/SIP/Message/SIP_t_NameAddress.cs
Net/Net/SIP/Message/SIP_t_OptionTag.cs
Net/Net/SIP/Message/SIP_t_RAck.cs
Net/Net/SIP/Message/SIP_t_RCValue.cs
Net/Net/SIP/Message/SIP_t_ReasonValue.cs
Net/Net/SIP/Message/SIP_t_ReferredBy.cs
Net/Net/SIP/Message/SIP_t_ReferSub.cs
Net/Net/SIP/Message/SIP_t_Replaces.cs
Net/Net/SIP/Message/SIP_t_RetryAfter.cs
Net/Net/SIP/Message/SIP_t_RValue.cs
Net/Net/SIP/Message/SIP_t_SecMechanism.cs
Net/Net/SIP/Message/SIP_t_SessionExpires.cs
Net/Net/SIP/Message/SIP_t_SubscriptionState.cs
Net/Net/SIP/Message/SIP_t_TargetDialog.cs
Net/Net/SIP/Message/SIP_t_Timestamp.cs
Net/Net/SIP/Message/SIP_t_To.cs
Net/Net/SIP/Message/SIP_t_Value.cs
Net/Net/SIP/Message/SIP_t_ValueWithParams.cs
Net/Net/SIP/Message/SIP_t_ViaParm.cs
Net/Net/SIP/Message/SIP_t_WarningValue.cs
Net/Net/SIP/Message/SIP_WarningCodes.cs
Net/Net/SIP/Proxy/
Net/Net/SIP/Proxy/SIP_AuthenticateEventArgs.cs
Net/Net/SIP/Proxy/SIP_B2BUA.cs
Net/Net/SIP/Proxy/SIP_B2BUA_Call.cs
Net/Net/SIP/Proxy/SIP_ForkingMode.cs
Net/Net/SIP/Proxy/SIP_Gateway.cs
Net/Net/SIP/Proxy/SIP_GatewayEventArgs.cs
Net/Net/SIP/Proxy/SIP_Presence.cs
Net/Net/SIP/Proxy/SIP_ProxyContext.cs
Net/Net/SIP/Proxy/SIP_ProxyCore.cs
Net/Net/SIP/Proxy/SIP_ProxyMode.cs
Net/Net/SIP/Proxy/SIP_Registrar.cs
Net/Net/SIP/Proxy/SIP_Registration.cs
Net/Net/SIP/Proxy/SIP_RegistrationCollection.cs
Net/Net/SIP/Proxy/SIP_RegistrationContact.cs
Net/Net/SIP/SIP_Uri.cs
Net/Net/SIP/SIP_Utils.cs
Net/Net/SIP/SIP_ValidateRequestEventArgs.cs
Net/Net/SIP/Stack/
Net/Net/SIP/Stack/SIP_ClientTransaction.cs
Net/Net/SIP/Stack/SIP_Dialog.cs
Net/Net/SIP/Stack/SIP_DialogState.cs
Net/Net/SIP/Stack/SIP_EndPointInfo.cs
Net/Net/SIP/Stack/SIP_Methods.cs
Net/Net/SIP/Stack/SIP_Request.cs
Net/Net/SIP/Stack/SIP_RequestReceivedEventArgs.cs
Net/Net/SIP/Stack/SIP_Response.cs
Net/Net/SIP/Stack/SIP_ResponseCodes.cs
Net/Net/SIP/Stack/SIP_ResponseReceivedEventArgs.cs
Net/Net/SIP/Stack/SIP_ResponseSentEventArgs.cs
Net/Net/SIP/Stack/SIP_ServerTransaction.cs
Net/Net/SIP/Stack/SIP_Stack.cs
Net/Net/SIP/Stack/SIP_StatusCodeType.cs
Net/Net/SIP/Stack/SIP_Target.cs
Net/Net/SIP/Stack/SIP_TimerConstants.cs
Net/Net/SIP/Stack/SIP_Transaction.cs
Net/Net/SIP/Stack/SIP_TransactionLayer.cs
Net/Net/SIP/Stack/SIP_TransactionState.cs
Net/Net/SIP/Stack/SIP_Transport.cs
Net/Net/SIP/Stack/SIP_TransportException.cs
Net/Net/SIP/Stack/SIP_TransportLayer.cs
Net/Net/SIP/ToDo.txt
Net/Net/SMTP/
Net/Net/SMTP/BodyType.cs
Net/Net/SMTP/Client/
Net/Net/SMTP/Client/SMTP_Client.cs
Net/Net/SMTP/Client/SMTP_ClientException.cs
Net/Net/SMTP/Relay/
Net/Net/SMTP/Relay/Relay_Mode.cs
Net/Net/SMTP/Relay/Relay_Queue.cs
Net/Net/SMTP/Relay/Relay_QueueItem.cs
Net/Net/SMTP/Relay/Relay_Server.cs
Net/Net/SMTP/Relay/Relay_Session.cs
Net/Net/SMTP/Relay/Relay_SessionCompletedEventArgs.cs
Net/Net/SMTP/Relay/Relay_SmartHost.cs
Net/Net/SMTP/Server/
Net/Net/SMTP/Server/AuthUser_EventArgs.cs
Net/Net/SMTP/Server/GetMessageStoreStream_eArgs.cs
Net/Net/SMTP/Server/MessageStoringCompleted_eArgs.cs
Net/Net/SMTP/Server/SmtpServerReply.cs
Net/Net/SMTP/Server/SMTP_Server.cs
Net/Net/SMTP/Server/SMTP_Session.cs
Net/Net/SMTP/Server/ValidateMailboxSize_EventArgs.cs
Net/Net/SMTP/Server/ValidateRecipient_EventArgs.cs
Net/Net/SMTP/Server/ValidateSender_EventArgs.cs
Net/Net/SMTP/Server/_SMTP_Cmd_Validator.cs
Net/Net/SMTP/SMTP_ServiceExtensions.cs
Net/Net/SMTP/SMTP_Utils.cs
Net/Net/SNTP/
Net/Net/SNTP/Client/
Net/Net/SNTP/Client/SNTP_Client.cs
Net/Net/SslMode.cs
Net/Net/StringReader.cs
Net/Net/STUN/
Net/Net/STUN/Client/
Net/Net/STUN/Client/STUN_Client.cs
Net/Net/STUN/Client/STUN_NetType.cs
Net/Net/STUN/Client/STUN_Result.cs
Net/Net/STUN/Message/
Net/Net/STUN/Message/STUN_Message.cs
Net/Net/STUN/Message/STUN_MessageType.cs
Net/Net/STUN/Message/STUN_t_ChangeRequest.cs
Net/Net/STUN/Message/STUN_t_ErrorCode.cs
Net/Net/TCP/
Net/Net/TCP/TCP_Client.cs
Net/Net/TCP/TCP_Server.cs
Net/Net/TCP/TCP_ServerSession.cs
Net/Net/TCP/TCP_ServerSessionEventArgs.cs
Net/Net/TCP/TCP_Session.cs
Net/Net/TCP/TCP_SessionCollection.cs
Net/Net/TextUtils.cs
Net/Net/UDP/
Net/Net/UDP/UDP_PacketEventArgs.cs
Net/Net/UDP/UDP_ProcessMode.cs
Net/Net/UDP/UDP_Server.cs
Net/Net/URI/
Net/Net/URI/AbsoluteURI.cs
Net/Net/URI/UriSchemes.cs
Net/Net/vCard/
Net/Net/vCard/DeliveryAddress.cs
Net/Net/vCard/DeliveryAddressCollection.cs
Net/Net/vCard/DeliveryAddressType_enum.cs
Net/Net/vCard/EmailAddress.cs
Net/Net/vCard/EmailAddressCollection.cs
Net/Net/vCard/EmailAddressType_enum.cs
Net/Net/vCard/Item.cs
Net/Net/vCard/ItemCollection.cs
Net/Net/vCard/Name.cs
Net/Net/vCard/PhoneNumber.cs
Net/Net/vCard/PhoneNumberCollection.cs
Net/Net/vCard/PhoneNumberType_enum.cs
Net/Net/vCard/vCard.cs
Net/Net/WellKnownPorts.cs
Net/Net/_AsyncResultState.cs
Net/Net/_Obsolete/
Net/Net/_Obsolete/Log_EventArgs.cs
Net/Net/_Obsolete/ReadException.cs
Net/Net/_Obsolete/ReadLine_EventArgs.cs
Net/Net/_Obsolete/ReadToStream_EventArgs.cs
Net/Net/_Obsolete/SmtpClientEx.cs
Net/Net/_Obsolete/SocketCallBackResult.cs
Net/Net/_Obsolete/SocketEx.cs
Net/Net/_Obsolete/SocketLogEntry.cs
Net/Net/_Obsolete/SocketLogEntryType.cs
Net/Net/_Obsolete/SocketLogger.cs
Net/Net/_Obsolete/SocketServer.cs
Net/Net/_Obsolete/SocketServerSession.cs
Net/Net/_Obsolete/StreamHelper.cs
Net/Net/_Obsolete/StreamLineReader.cs
Net/Net/_Obsolete/WriteStream_EventArgs.cs
Net/Net/_Obsolete/Write_EventArgs.cs
Net/ToDo.txt
Net/version.txt