How to read the data data from microcontroller using command line

appsto port
    R L S F 1 CR LF
port to apps
    R L S F 1 CR LF
port to apps
   L D S E 3 CR LF

 READ data 
port to apps
L D E  D 5 CR LF
apps to port
R L E E 3 CR LF
 port to apps
R L E E 3 CR LF

o/p in serial monitor 
 rec:-   R L S F 1 CR LF
 snd:-  R L S F 1 CR LF
 snd:-  L D S E 3 CR LF
data didnt transfer to apps from microcontroller
 snd:-  L D E  D 5 CR LF
 rec:-  R L E E 3 CR LF
 snd:-  R L E E 3 CR LF

private: System::Void ReadBtn_Click(System::Object^ sender, System::EventArgs^ e)
   {
       if (serialPort1->IsOpen)
       {
           cli::array<System::Byte>^ dateS = gcnew cli::array<System::Byte> {0x52, 0x4C, 0x53, 0x46, 0x31, 0x0D, 0x0A};
           serialPort1->Write(dateS, 0, dateS->Length);
           cli::array<System::Byte>^ byts = gcnew cli::array<System::Byte>(dateS->Length);
           serialPort1->Read(byts, 0, dateS->Length);
           Thread::Sleep(10);
           textBox2->Text = System::Text::UTF8Encoding::UTF8->GetString(byts);
           textBox1->Text = "RLSF1";

           if (textBox1.Text==textBox2.Text)
           {
               serialPort1->DataReceived += gcnew SerialDataReceivedEventHandler(port_OnReceiveData); // Add DataReceived Event Handler
           }
           Console::Read();

       }

   }
   private : static void port_OnReceiveData(Object^ sender,SerialDataReceivedEventArgs^ e)
   {
          SerialPort^ spL = (SerialPort^)sender;
            String^ deta =  spL->ReadExisting();
            MessageBox::Show(deta);
            cli::array<System::Byte>^ en = gcnew cli::array<System::Byte>{0x52, 0x4C, 0x45, 0x45, 0x33, 0x0D, 0x0A};
            spL->Write(en, 0, en->Length);
            cli::array<System::Byte>^ bys = gcnew cli::array<System::Byte>(en->Length);
            spL->Read(bys, 0, en->Length);

            spL->Close();


   }