asp.net向文件写入日志

 using System;
using System.IO;
namespace WriteLog
{
    /// <summary>
    /// WriteInLog 的摘要说明。
    /// </summary>
    public class WriteInLog
    {
        private string logFileName;
        private int logFileSizes;
        
        /// <summary>
        /// 写入日志文件
        /// </summary>
        public WriteInLog()
        {
            logFileName = @"d:\logfile.txt";
        }
        /// <summary>
        /// 自动删除日志文件大小,此方法已经重载.
        /// </summary>
        /// <param name="fileSize">日志文件大小,单位KB</param>
        public WriteInLog(int fileSize):this()
        {
            if(fileSize != 0)
            {
                this.logFileSizes = fileSize * 1024;
            }
  &nb