如何将大字符串写入NetworkStream？

using System;
using System.IO;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        TcpClient client = new TcpClient("127.0.0.1", 12345);
        NetworkStream stream = client.GetStream();

        string largeString = new string('a', 1024 * 1024); // 1MB字符串
        byte[] buffer = Encoding.UTF8.GetBytes(largeString);

        int chunkSize = 4096; // 每次发送4KB数据
        int offset = 0;

        while (offset< buffer.Length)
        {
            int count = Math.Min(chunkSize, buffer.Length - offset);
            await stream.WriteAsync(buffer, offset, count);
            offset += count;
        }

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