How to read the large data from serial port in visual c++/cli

Question

i am trying to read the large file from serial port

expected output

112

212

311

411

but i get new line between some data like

output

112

212

/n

311

/n

411

I got some extra new line .how to solve it

	private: System::Void ReadDatabtn_Click(System::Object^ sender, System::EventArgs^ e)

   {
      
        if (this->serialPort1->IsOpen == true)
		{
           
              
						Thread^ readThread = gcnew Thread(gcnew ThreadStart(this, &main_form::ReadData));
						readThread->IsBackground = true;
						readThread->Start();
					
			
        }
   }  

  private: System::Void ReadData()
	{

		while (true)
		{
         
            const int CHUNK_SIZE = 4096; // Read data in 1 MB chunks

			cli::array<Byte>^ buffer = gcnew cli::array<Byte>(CHUNK_SIZE);

			StringBuilder^ dataBuilder = gcnew StringBuilder();
          if (serialPort1->BytesToRead > 0)
			{
				// Read data from the serial port into the buffer
				int bytesRead = serialPort1->Read(buffer, 0, CHUNK_SIZE);
				
				
					// add the received character to the data string
					String^ data = Encoding::UTF8->GetString(buffer, 0, bytesRead);
					dataBuilder->Append(data);
				
				if (dataBuilder->Length >= CHUNK_SIZE)
				{
					String^ chunkData = dataBuilder->ToString(0, CHUNK_SIZE);
					dataBuilder->Remove(0, CHUNK_SIZE); // Remove the processed data from the StringBuilder
					this->Invoke(gcnew Action<String^>(this, &main_form::UpdateUI), chunkData);
				}
				String^ remainingData = dataBuilder->ToString();
				while (remainingData->Contains("\n\n"))
				{
					remainingData = remainingData->Replace("\n\n", "\n");

				}
				this->Invoke(gcnew Action<String^>(this, &main_form::UpdateUI), remainingData);
			}

	       Thread::Sleep(100);
		}
	}

private: System::Void UpdateUI(String^ data)
	{
		
		richTextBox1->AppendText(data);
		
	}