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 = 0,
        Warning = 1,
        Error = 2
    }

config配置

<configuration>
  <system.diagnostics>
    <trace autoflush="true" indentsize="0">
      <listeners>
        <add name="LogListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="..logLogConsoleApp.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