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https://issues.apache.org/jira/browse/LOG4NET-400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13792573#comment-13792573
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Gian Marco Gherardi commented on LOG4NET-400:
---------------------------------------------

I think the greatest flexibility would be to expose a method like the one found 
in CommonLogging 
(http://netcommon.sourceforge.net/docs/2.1.0/reference/html/ch01.html#logging-usage)

{code}
log.Debug( m => m("my expensive to calculate argument is: {0}", 
CalculateMessageInfo()) );
{code}

Meaning thet the lambda mixes in string.Format functionality found in ILog. 
With the current {{ILogExtensionsMethods}} implementation the same code must be 
written like this:

{code}
log.DebugExt( () => string.Format("my expensive to calculate argument is: {0}", 
CalculateMessageInfo()) );
{code}


> ILog extension methods doesnt work as expected
> ----------------------------------------------
>
>                 Key: LOG4NET-400
>                 URL: https://issues.apache.org/jira/browse/LOG4NET-400
>             Project: Log4net
>          Issue Type: Improvement
>            Reporter: Gian Marco Gherardi
>
> Hi, I'm trying the feature LOG4NET-290, but seems that the following format 
> doesn't work:
>   log.Debug( m=>m("value= {0}", obj.Value) ); 
> Instead this seems the correct signature:
>   log.Debug(() => string.Format("value= {0}", obj.Value));
> That is not as convenient IMO. Another thing I've noticed is that there are 
> also many extension methods that merely proxy the methods already supported 
> by plain ILog. What's the reason for that? I mean ILog methods already skip 
> logging if level is not active.



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