我正在尝试使用带有mllp的vb.net发送hl7，谁能告诉我这是我的代码错误DimStartBlockAsString="0x0b"'thisisstartblockDimEndBlockAsString="0x0d"'thisisendBlockDimReturnBlockAsString="0x1c"'thisisreturnMsg=StartBlock&Msg&EndBlock&ReturnBlockDimnetworkStreamAsNetworkStream=tcpClient.GetStream()IfnetworkStream.CanWriteAndnetworkStr