ASP.NET中记录Log到txt文件的方法

ASP.NET中记录Log到txt文件的方法：

public static void addLogErr(string SPName, string ErrDescribe)
        {
            string tracingFile = "C:/inetpub/wwwroot/log/"; //Server.MapPath("/log/")
            if (!System.IO.Directory.Exists(tracingFile))
                System.IO.Directory.CreateDirectory(tracingFile);
            string fileName = DateTime.Now.ToString("yyyyMMdd") + ".txt";
            tracingFile += fileName;
            if (tracingFile != String.Empty)
            {
                System.IO.FileInfo file = new System.IO.FileInfo(tracingFile);
                System.IO.StreamWriter debugWriter = new System.IO.StreamWriter(file.Open(System.IO.FileMode.Append, System.IO.FileAccess.Write, System.IO.FileShare.ReadWrite));
                debugWriter.WriteLine(SPName + " (" + System.DateTime.Now.ToString() + ") " + " :");
                debugWriter.WriteLine(ErrDescribe);
                debugWriter.WriteLine();
                debugWriter.Flush();
                debugWriter.Close();
            }
        }

调用方法：

addLogErr("ApplyForm", "originalReason:"+originalReason);

Log示例：

ApplyForm (2008-11-13 20:13:48)  :
originalReason:5LiA5ZOB6buR5p2/5pyJ6ZmQ5YWs5Y+45LiA5ZOB6buR5p2/5pyJ6Zm