<root>
    <level value="ERROR" />
    <appender-ref ref="LogFileAppender" />
    <appender-ref ref="EventLogAppender" />
</root>
<logger name="Log4NETDemo.Class1">
    <level value="FATAL" />
    <appender-ref ref="SmtpAppender" />
</logger>

class Log4NetDemoClass
{
    private static readonly log4net.ILog log = 
log4net.LogManager.
GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

    [STAThread]
    static void Main(string[] args)
    {
        // Log an info level message
        if (log.IsInfoEnabled)
        {
            log.Info("Uygulama Başlatıldı.");
        }

        // Log a debug message. Test if debug is enabled before
        // attempting to log the message. This is not required but
        // can make running without logging faster.
        if (log.IsDebugEnabled)
        {
            log.Debug("Debug mesajı.");
        }

        try
        {
            // Hata ! [DivideByZeroException] :
            int a = 0;
            int b = 35 / a;
        }
        catch(DivideByZeroException ex)
        {
            // Log an error with an exception
            log.Error("0"a bölme hatası !", ex);
        }

        log.Error("Hata mesajı !");
        log.Warn("Uyarı mesajı !");


        // Log an info level message
        if (log.IsInfoEnabled)
        {
            log.Info("Uygulama sonlandırıldı.");
        }

        Console.ReadLine();
    }
}

<appender name="ADONetAppender_SqlServer" type="log4net.Appender.AdoNetAppender">
    <bufferSize value="1" />
    <connectionType value="System.Data.SqlClient.SqlConnection, 
        System.Data, Version=1.0.3300.0, Culture=neutral, 
        PublicKeyToken=b77a5c561934e089" />
    <connectionString value="data source=MORDOR\DENEME;
        initial catalog=Shark;integrated security=false;
        persist security info=True;User ID=sa;Password=xxx" />
    <commandText value="INSERT INTO Log 
        ([Date],[Thread],[Level],[Logger],[Message]) 
        VALUES (@log_date, @thread, @log_level, @logger, @message)" />
    <parameter>
        <parameterName value="@log_date" />
        <dbType value="DateTime" />
        <layout type="log4net.Layout.RawTimeStampLayout" />
    </parameter>
    <parameter>
        <parameterName value="@thread" />
        <dbType value="String" />
        <size value="255" />
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%thread" />
        </layout>
    </parameter>
    <parameter>
        <parameterName value="@log_level" />
        <dbType value="String" />
        <size value="50" />
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%level" />
        </layout>
    </parameter>
    <parameter>
        <parameterName value="@logger" />
        <dbType value="String" />
        <size value="255" />
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%logger" />
        </layout>
    </parameter>
    <parameter>
        <parameterName value="@message" />
        <dbType value="String" />
        <size value="4000" />
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%message" />
        </layout>
    </parameter>
</appender>

<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender" >
    <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level 
            %logger [%property{NDC}] - %message%newline" />
    </layout>
</appender>

<appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">
    <to value="[email protected]" />
    <from value="[email protected]" />
    <subject value="LOGING TEST" />
    <smtpHost value="mail.domain.com" />
    <bufferSize value="1024" />
    <lossy value="true" />
    <evaluator type="log4net.Core.LevelEvaluator">
        <threshold value="ERROR"/>
    </evaluator>
    <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%newline%date [%thread] %-5level 
            %logger [%property{NDC}] - %message%newline%newline%newline" />
    </layout>
</appender>