C#简单地输出Log日志

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

namespace MsgLog
{
public class WriteLog
{
public static void WritetoLog(string txt)
{

try
{

string path = ConfigurationManager.AppSettings["logpath"];
if (!Directory.Exists(path))
{

Directory.CreateDirectory(path);

}

path += DateTime.Now.ToString("yyyyMMdd") + ".txt";

if (!File.Exists(path))
{

File.Create(path);

}

FileStream fs;

StreamWriter sw;

fs = new FileStream(path, FileMode.Append);

sw = new StreamWriter(fs, Encoding.Default);

sw.Write(txt);

sw.Close();

fs.Close();

}

catch (Exception ex)
{

WritetoLog("程序发生异常（WriteLog）。详情：" + ex.Message);

}

}
}
}