Cara menggunakan fail IO dan operasi strim untuk membaca dan menulis data dalam C#

string filePath = "D:\test.txt";

using (FileStream fileStream = new FileStream(filePath, FileMode.Create))
{
    // 执行文件操作
}

string filePath = "D:\test.txt";

using (StreamReader streamReader = new StreamReader(filePath))
{
    string content = streamReader.ReadToEnd();
    Console.WriteLine(content);
}

string filePath = "D:\test.txt";
string content = "Hello, World!";

using (StreamWriter streamWriter = new StreamWriter(filePath))
{
    streamWriter.Write(content);
}

string filePath = "D:\test.bin";
byte[] data = { 0x01, 0x02, 0x03, 0x04 };

using (FileStream fileStream = new FileStream(filePath, FileMode.Create))
{
    fileStream.Write(data, 0, data.Length);
}

string filePath = "D:\test.txt";

using (FileStream fileStream = new FileStream(filePath, FileMode.Open))
{
    using (StreamReader streamReader = new StreamReader(fileStream))
    {
        string content = streamReader.ReadToEnd();
        Console.WriteLine(content);
    }
}

string filePath = "D:\test.txt";
string content = "Hello, World!";

using (FileStream fileStream = new FileStream(filePath, FileMode.Create))
{
    using (StreamWriter streamWriter = new StreamWriter(fileStream))
    {
        streamWriter.Write(content);
    }
}

using (TcpClient client = new TcpClient("127.0.0.1", 8080))
{
    using (NetworkStream networkStream = client.GetStream())
    {
        byte[] buffer = new byte[1024];
        int bytesRead = networkStream.Read(buffer, 0, buffer.Length);

        string response = Encoding.UTF8.GetString(buffer, 0, bytesRead);
        Console.WriteLine(response);
    }
}

using (TcpClient client = new TcpClient("127.0.0.1", 8080))
{
    using (NetworkStream networkStream = client.GetStream())
    {
        string request = "Hello, Server!";
        byte[] buffer = Encoding.UTF8.GetBytes(request);

        networkStream.Write(buffer, 0, buffer.Length);
    }
}