Type initialization error

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I got the following error

The type initializer for 'System.Windows.Application' threw an exception

when I've the following content in app.config file. This is a WPF application.

XML

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
	<log4net>
		<appender name="RollingFileAppenderV1" type="log4net.Appender.RollingFileAppender">
			<file type="log4net.Util.PatternString" value="xxxzzzlog.txt"/>
			<appendToFile value="true"/>
			<rollingStyle value="Size"/>
			<maxSizeRollBackups value="50"/>
			<maximumFileSize value="100KB"/>
			<staticLogFileName value="true"/>
			<countDirection value="1"/>
			<layout type="log4net.Layout.PatternLayout">
				<param name="ConversionPattern" value="[%d{yyyy-MM-dd hh:mm:ss}] - [%-5p] – %m%n"/>
			</layout>
		</appender>
		<root>
			<level value="ALL"/>
			<appender-ref ref="RollingFileAppenderV1"/>
		</root>
	</log4net>
	<startup>
		<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
	</startup>
</configuration>

Still I couldn't find what's wrong with this config file. Without the log4net configuration it works fine. Any comments really appreciate.

Posted 16-Jul-15 0:05am

CodingLover

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CodingLover · Accepted Answer · 2015-07-16T00:23:00

Solution 1

I Found the solutions, I've miss the configuration for log4net. Following need to be in the app.config just before the log4net tag.

XML

<configsections>
	<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net" />
</configsections>

Posted 16-Jul-15 0:23am

CodingLover