封装一个C#日志类Loger

     public class Loger
     {
         /// <summary>
         /// 写入日志
         /// </summary>
         /// <param name="content">日志内容</param>
         /// <param name="title">日志标题</param>
         /// <param name="folderName">文件夹名称</param>
         /// <param name="filePrefixName">文件前缀名</param>
         public static void Write(string content, string title = "", string folderName = "Log", string filePrefixName = "Log")
         {
             try
             {
                 lock (typeof(Loger))
                 {
                     DateTime dateTimeNow = DateTime.Now;
                     string logDirPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log", folderName);
                     if (!Directory.Exists(logDirPath))
                     {
                         Directory.CreateDirectory(logDirPath);
                     }

                     string logFilePath = string.Format("{0}/{1}-{2}.txt", logDirPath, filePrefixName, dateTimeNow.ToString("yyyy-MM-dd"));
                     using (StreamWriter writer = new StreamWriter(logFilePath, true, Encoding.UTF8))
                     {
                         try
                         {
                             writer.WriteLine("------------------------------------------------------------------------------------------");
                             writer.WriteLine(title);
                             writer.WriteLine("日志时间：" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"));
                             writer.WriteLine(content);
                             writer.WriteLine("------------------------------------------------------------------------------------------");
                         }
                         catch (Exception ex)
                         {
                             Console.WriteLine("Loger.cs Line45" + ex.Message);
                         }

                         writer.Close();
                     }
                 }
             }
             catch(Exception ex)
             {
                 Console.WriteLine("Loger.cs Line54" + ex);
                 //throw new Exception("无法将日志写入文件,请查看安装目录是否有权限!");
             }
         }

         /// <summary>
         /// 写入日志
         /// </summary>
         /// <param name="format">符合格式字符串</param>
         /// <param name="args">一个对象数组，其中包含零个或多个要设置格式的对象</param>
         public static void WriteFormat(string format, params object[] args)
         {
             string content = string.Format(format, args);
             Write(content, "", "Log", "Log");
         }

         /// <summary>
         /// 写入日志
         /// </summary>
         /// <param name="ex">Exception对象</param>
         /// <param name="title">日志标题</param>
         /// <param name="folderName">文件夹名称</param>
         /// <param name="filePrefixName">文件前缀名</param>
         public static void Write(Exception ex, string title = "", string folderName = "Exception", string filePrefixName = "Exception")
         {
             string content = string.Format("错误信息：{1}{0}错误来源：{2}{0}堆栈信息：{0}{3}", Environment.NewLine, ex.Message, ex.Source, ex.StackTrace);
             Write(content, title, folderName, filePrefixName);
         }
     }