文本读写

使用FileStream读取

using(FileStream fs = File.OpenRead(@"/Users/wxl/Workplace/test.txt"))
{
    byte[] arr = new byte[100];
    UTF8Encoding encoding = new UTF8Encoding(true);
    while(fs.Read(arr, 0, arr.Length) > 0)
    {
        Console.WriteLine(encoding.GetString(arr));
    }
}

使用FileStream写入

using(StreamWriter ws = new StreamWriter(@"/Users/wxl/Workplace/test.txt"))
{
    string[] arr = new string[]{"hello\n","汪晓龙"};

    foreach(var str in arr)
    {
        ws.WriteLine(str);
    }
}

使用StreamReader读取

using(StreamReader sr = new StreamReader(@"/Users/wxl/Workplace/test.txt"))
{
    string line;
    while((line = sr.ReadLine()) != null)
    {
        Console.WriteLine(line);
    }
}

使用StreamWriter写入

using(StreamWriter ws = new StreamWriter(@"/Users/wxl/Workplace/test.txt"))
{
    string[] arr = new string[]{"hello","world"};

    foreach(var str in arr)
    {
        ws.WriteLine(str);
    }
}