Replace log4net replacement for Elmah

Global.asax.cs

protected void Application_Error(object sender, EventArgs e)
{
    var error = Server.GetLastError();
    var log = LogManager.GetLogger(GetType());
    var msg = string.Format("\r\nPath: {0}\r\nMethod: {4}\r\nUser: {1}\r\nForm: {2}\r\nReferer: {3}",
        Request.Url,
        User.Identity.Name,
        Request.Form,
        Request.UrlReferrer,
        Request.HttpMethod);
    log.Error(msg, error);
}

protected void Application_Start(object sender, EventArgs e)
{
   log4net.Config.XmlConfigurator.Configure();
   // the rest
}

HandleErrorAttribute.cs

// We have to override the default HandleErrorAttribute. place class in your default namespace
public class HandleErrorAttribute : System.Web.Mvc.HandleErrorAttribute
{
    public override void OnException(ExceptionContext context)
    {
        base.OnException(context);
        var log = LogManager.GetLogger("My application");
        var msg = string.Format("\r\nPath: {0}\r\nMethod: {4}\r\nUser: {1}\r\nForm: {2}\r\nReferer: {3}",
            context.HttpContext.Request.Url,
            context.HttpContext.User.Identity.Name,
            context.HttpContext.Request.Form,
            context.HttpContext.Request.UrlReferrer,
            context.HttpContext.Request.HttpMethod);
        log.Error(msg, context.Exception);
    }
}

log4net.config.xml

<log4net>
  <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
    <file value="c:\logs\myapp.txt" />
    <appendToFile value="true" />
    <rollingStyle value="Date" />
    <datePattern value="yyyyMMdd" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date %-5level %logger - %message%newline" />
    </layout>
  </appender>
  <appender name="MailAppender" type="log4net.Appender.SmtpAppender">
    <to value="exceptions@mon7.se" />
    <from value="no-reply@mon7.se" />
    <subject value="EES Exceptions" />
    <smtpHost value="smtp.yourserver.com" />
    <authentication value="basic"/>
    <username value="login"/>
    <password value="password"/>
    <port value="587"/>
    <bufferSize value="512" />
    <lossy value="false" />
    <evaluator type="log4net.Core.LevelEvaluator">
      <threshold value="WARN"/>
    </evaluator>
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%newline%date %-5level %logger - %message%newline%newline%newline" />
    </layout>
  </appender>
  <root>
    <level value="WARN"/>
    <appender-ref ref="RollingLogFileAppender"/>
    <appender-ref ref="MailAppender"/>
  </root>
</log4net>