TCP Client in ASP.NET Core Web API

controller.cs

using Microsoft.AspNetCore.Mvc;
using System.Net.Sockets;

namespace SimpleSocket.Controllers;

[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    [HttpGet(Name = "GetWeatherForecast")]
    public async Task<IActionResult> GetAsync()
    {
        try
        {
            using var client = new TcpClient();

            await client.ConnectAsync("10.10.100.254", 8899);
            using NetworkStream stream = client.GetStream();

            byte[] sendBytes = Convert.FromHexString("140100000001");
            await stream.WriteAsync(ModbusCrc(sendBytes));

            byte[] buffer = new byte[16];
            int bytesRead = await stream.ReadAsync(buffer, new CancellationTokenSource(99).Token);
            string receivedHex = Convert.ToHexString(buffer, 0, bytesRead);

            byte status = buffer[3];
            if (status == 0x00u)
            {
                byte[] ffCommand = Convert.FromHexString("14050000FF00");
                await stream.WriteAsync(ModbusCrc(ffCommand));
            }
            else if (status == 0x01u)
            {
                byte[] zeroCommand = Convert.FromHexString("140500000000");
                await stream.WriteAsync(ModbusCrc(zeroCommand));
            }

            stream.Close();
            client.Close();

            return this.Ok(new { ReceivedHex = receivedHex });
        }
        catch (SocketException ex)
        {
            return this.StatusCode(500, $"Socket error: {ex.Message}");
        }
        catch (System.Exception ex)
        {
            return this.StatusCode(500, $"Error: {ex.Message}");
        }
    }

    private static byte[] ModbusCrc(byte[] data)
    {
        ushort crc = 0xFFFF;
        foreach (byte b in data)
        {
            crc ^= b;
            for (int i = 0; i < 8; i++)
            {
                if ((crc & 0x0001) != 0)
                {
                    crc >>= 1;
                    crc ^= 0xA001;
                }
                else
                {
                    crc >>= 1;
                }
            }
        }

        Console.WriteLine(Convert.ToHexString(BitConverter.GetBytes(crc)));

        return [.. data, .. BitConverter.GetBytes(crc)];
    }
}