c#将错误信息写入日志

在应用程序中创建文件夹，命名为ErrorLog，然后执行下列程序

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
                //创建错误文件目录
                string path = Directory.GetCurrentDirectory();
                DirectoryInfo a = Directory.GetParent(path);
                a = Directory.GetParent(a.FullName);
                string[] dirs = Directory.GetDirectories(a.FullName, "ErrorLog");
                string pa = dirs[0] + "\\" + DateTime.Now.Year.ToString() + "\\" + DateTime.Now.Month.ToString();
                string log = pa + "\\" + DateTime.Now.ToShortDateString() + ".txt";
                /*检查并创建文件夹*/
                if (!Directory.Exists(pa))
                {
                    Directory.CreateDirectory(pa);
                }
                /*检查并创建日志记录*/
                if (!File.Exists(log))
                    File.Create(log).Close();

                //将错误信息以下面的格式写入目录中
                using (StreamWriter w = File.AppendText(log))
                {
                    w.WriteLine("Error Time:{0}", "123");
                    w.WriteLine("__________________________");
                    w.Flush();
                    w.Close();
                }
        }
    }
}