log4net properties config

config.xml

<log4net>
<appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
      <bufferSize value="1" />
      <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
      <connectionStringName value="ConnectionName" />
      <commandText value="INSERT INTO dbo.tbl_Log4Net_Log ([Date],[User],[Application],[Thread],[Ndc],[Level],[Logger],[Message],[Exception]) VALUES (@log_date, @user, @application, @thread, @ndc, @log_level, @logger, @message, @exception)" />
      <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="@user" />
        <dbType value="String" />
        <size value="50" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%X{user}" />
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@application" />
        <dbType value="String" />
        <size value="50" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%X{application}" />
        </layout>
      </parameter>
      <parameter>
        <parameterName value="@ndc" />
        <dbType value="String" />
        <size value="36" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%ndc" />
        </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>
      <parameter>
        <parameterName value="@exception" />
        <dbType value="String" />
        <size value="2000" />
        <layout type="log4net.Layout.ExceptionLayout" />
      </parameter>
    </appender>
<logger name="DebugSqlLogger">
      <level value="DEBUG" />
      <appender-ref ref="AdoNetAppender" />
    </logger>
</log4net>

loggingcode.cs

var debugSqlLogger = LogManager.GetLogger("DebugSqlLogger");
MDC.Set("user", username);
MDC.Set("application", "ApplicationName");
    using (log4net.NDC.Push(Guid.NewGuid().ToString()))
    {
    	debugSqlLogger.Debug("debug message!");
    }