log4net with asp.net core 2 - log4net

Question

i'm using log4net to create log files dynamicaly , i tried the following steps here http://geekswithblogs.net/rgupta/archive/2009/03/03/dynamic-log-filenames-with-log4net.aspx but i'm getting (null).txt file , Here is my log4net.config file
`<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="app_data/log/%date{yyyy-MM-dd}/%property{LogName}.txt" />
<rollingStyle value="Date" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<datePattern value="yyyyMMdd" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10000KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value=" %-5level %date{dd-mm-yyyy HH:mm:ss} %logger [%thread] - %message %exception%newline%property{LogName}" />
</layout>
</appender>
<root>
<appender-ref ref="RollingFileAppender" />
<level value="All" />
</root>
</log4net>`
and this is my test code
log4net.GlobalContext.Properties["LogName"] = "xx#xx.xx";
As i said i'm getting (null).txt FileName instead of xx#xx.xx.txt , thanks for helping

Answer 1

I just tested your code and its working just fine, so I can only assume, that you are assigning your GlobalContext property to late. Remember, to set it before you call XmlConfigurator.Configure method. Set it up in your Program.cs file like this:
public static class Program
{
public static void Main(string[] args)
{
// ...
GlobalContext.Properties["LogName"] = "xx#xx.xx";
XmlConfigurator.Configure(new FileInfo("log4net.config"));
// ...
}
}