TraceHelper

     public class TraceHelper
     {
         private static TraceHelper _traceHelper;

         private TraceHelper()
         {
         }

         public static TraceHelper GetInstance()
         {
             if (_traceHelper == null)
                 _traceHelper = new TraceHelper();

             return _traceHelper;
         }

         public void Error(string message, Exception ex)
         {
             Log(message, MessageType.Error, ex);
         }

         public void Warning(string message, Exception ex)
         {
             Log(message, MessageType.Warning, ex);
         }

         public void Info(string message, Exception ex)
         {
             Log(message, MessageType.Information, ex);
         }

         private void Log(string message, MessageType type, Exception ex)
         {
             string exmsg = ex == null ? "" : "堆栈信息:" + ex.StackTrace;
             Trace.WriteLine(
                 string.Format("{0},{1},{2},{3}",
                 DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"),
                 type.ToString(),
                 message,
                 exmsg));
         }
     }

     public enum MessageType
     {
         Information = ,
         Warning = ,
         Error =
     }

config配置

 <configuration>
   <system.diagnostics>
     <trace autoflush="true" indentsize="">
       <listeners>
         <add name="LogListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="..\log\LogConsoleApp.log"/>
       </listeners>
     </trace>
   </system.diagnostics>
 </configuration>

在运行程序目录上一层会生成一个Log\\LogConsoleApp.log文件