C# 简单的往txt中写日志,调试时很有用 【转】

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Windows.Forms;

namespace Common
{
public class Log
{
private string logFile;
private StreamWriter writer;
private FileStream fileStream = null;

public Log(string fileName)
{
logFile = fileName;
CreateDirectory(logFile);
}

public void log(string info)
{

try
{
System.IO.FileInfo fileInfo = new System.IO.FileInfo(logFile);
if (!fileInfo.Exists)
{
fileStream = fileInfo.Create();
writer = new StreamWriter(fileStream);
}
else
{
fileStream = fileInfo.Open(FileMode.Append, FileAccess.Write);
writer = new StreamWriter(fileStream);
}
writer.WriteLine(DateTime.Now + ": " + info);

}
finally
{
if (writer != null)
{
writer.Close();
writer.Dispose();
fileStream.Close();
fileStream.Dispose();
}
}
}

public void CreateDirectory(string infoPath)
{
DirectoryInfo directoryInfo = Directory.GetParent(infoPath);
if (!directoryInfo.Exists)
{
directoryInfo.Create();
}
}
}
}