C#

<log4net>
		<!-- The DebugFileAppender writes all messages to a log file-->
		<appender name="GeneralAppender" type="log4net.Appender.FileAppender">
			<!-->the file where to write the events<-->
			<file value="GeneralLog.dat" />
			<!-->the lowest level a message must reach in order to get written in the log file<-->
			<threshold value="WARN" />
			<!-->a value indicating that every message is appended to the log file<-->
			<appendToFile value="true" />
			<maximumFileSize value="100KB"/>
			<rollingStyle value="Size"/>
			<!-->the message layout<-->
			<layout type="log4net.Layout.PatternLayout">
				<param name="ConversionPattern" value="[%d] - %m%n" />
			</layout>
		</appender>
		<root>
			<!-- add other appenders here and the log messages will be sent to every listed appender -->
			<appender-ref ref="GeneralAppender" />
		</root>
	</log4net>

FileAppender generalLogAppender = new FileAppender();
//Initialize the properties of the appender
generalLogAppender.Name = generalLogFileName;
generalLogAppender.File = "Log+"+ fileName + ".dat";
generalLogAppender.AppendToFile = true;
generalLogAppender.Threshold = Level.Warn;
PatternLayout layout2 = new PatternLayout();
layout2.ConversionPattern = "[%d] - %m%n";
layout2.ActivateOptions();
generalLogAppender.ActivateOptions();
BasicConfigurator.Configure(generalLogAppender);

private static evpml GetEntities()
        {
            return new evpml();
        }

        public static List<users> GetUsersDC()
        {
            return GetEntities().users.ToList<users>();
        }

string filePath=statee.ToString();
webVr.LoadFile(filePath);

Step 1 : regKey = Microsoft.Win32.Registry.LocalMachine.CreateSubKey("SOFTWARE\\Microsoft\\MyKey");

Step 2 : regRead = Microsoft.Win32.Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\MyKey", true);

Step 2 : regRead = Microsoft.Win32.Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\MyKey", true);