C#笔记（4）保存数据到文件，从文件读取数据

1.保存

StreamWriter sw = File.CreateText("data.bin");
sw.WriteLine("第一行");
sw.WriteLine("第二行");
sw.Flush();//刷新
sw.Close();//关闭

2.读取

StreamReader sr = File.OpenText("data.bin");
String firstLine = sr.ReadLine();
String secondLine = sr.ReadLine();
sr.Close();//关闭