如何在C#中读写文件

using System.IO;

string path = "file.txt";
using (StreamReader sr = new StreamReader(path))
{
    string line;
    while ((line = sr.ReadLine()) != null)
    {
        Console.WriteLine(line);
    }
}

using System.IO;

string path = "file.txt";
using (StreamWriter sw = new StreamWriter(path))
{
    sw.WriteLine("Hello, World!");
}

using System.IO;

string path = "file.bin";
using (BinaryReader br = new BinaryReader(File.Open(path, FileMode.Open)))
{
    int length = (int)br.BaseStream.Length;
    byte[] data = br.ReadBytes(length);
}

using System.IO;

string path = "file.bin";
using (BinaryWriter bw = new BinaryWriter(File.Open(path, FileMode.Create)))
{
    byte[] data = new byte[] { 0x01, 0x02, 0x03, 0x04 };
    bw.Write(data);
}