Using Log4Net in your application

Using Log4Net for logging errors

Step 1:Download and install Log4Net from

Step 2: Right click the project and add a reference to log4net.dll by selecting browse tab.

Step 3: Add the Log4Net configuration information to your web.config file.

<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net-net-1.0"/>

<appender name="TraceAppender" type="log4net.Appender.RollingFileAppender">
<file value="Application.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<countDirection value="1" />
<maximumFileSize value="1MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.XmlLayout" />
<logger name="LoggingExample">
<level value="ALL" />
<appender-ref ref="TraceAppender" />

Step 2:

Add the following code in your application to load the configuration for Log4Net.

string logFile = HttpContext.Current.Request.PhysicalApplicationPath + "web.config";
log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo(logFile));

Step 3:

Create a log category before logging any message by using LogManager class

public static log4net.ILog logger = log4net.LogManager.GetLogger("LoggingExample");

Step 4:

Log the message or exceptions in application as below.

try {

logger.Info("You are in try block");


catch(Exception ex)

logger.Error("Error in application: ", ex);



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