在我的TIdTCPServer.OnConnect事件中，我使用以下方式接收信息：

AContext.Connection.IOHandler.ReadLn(LF, 5000)

我已经读到ReadLn()在字符串的末尾需要LF，那么我需要在末尾添加LF吗？

TCPClient.IOHandler.WriteLn('TEXT' + LF);

我在WriteLn()中看到它已经自动包含了：

procedure TIdIOHandler.WriteLn(const AOut: string;
  AByteEncoding: IIdTextEncoding = nil
  {$IFDEF STRING_IS_ANSI}; ASrcEncoding: IIdTextEncoding = nil{$ENDIF}
  );
begin
                                                                                  
  // which encodes a LF character to byte $25 instead of $0A (and decodes
  // byte $0A to character #$8E instead of #$A).  To account for that, don't
  // encoding the CRLF using the specified encoding anymore, force the encoding
  // to what it should be...
  //
  // But, what to do if the target encoding is UTF-16?
  {
  Write(AOut, AByteEncoding{$IFDEF STRING_IS_ANSI, ASrcEncoding{$ENDIF);
  Write(EOL, Indy8BitEncoding{$IFDEF STRING_IS_ANSI, Indy8BitEncoding{$ENDIF);
  }

  // Do as one write so it only makes one call to network
  Write(AOut + EOL, AByteEncoding
    {$IFDEF STRING_IS_ANSI}, ASrcEncoding{$ENDIF}
    );
end;