c8-01.cs

一本很好的教材.C#开发者必备.内容全面,很难得哦.

//用try/catch语句捕捉异常示例
using System;
using System.IO;
using System.Security.Permissions;
[assembly:FileIOPermissionAttribute(SecurityAction.RequestMinimum, All = @"c:\\data.txt")]
public class ProcessFile {
    public static void Main() {
        try {
          StreamReader sr = File.OpenText("data.txt");
          Console.WriteLine("文件的第一行为：{0}",sr.ReadLine());
        }
        catch(Exception e) {
            Console.WriteLine("发生错误: '{0}'", e);
        }
    }
}