The Biggest Lie About the .NET Logger | .NET Tips 7

The .NET Logging API is lying!

[lorddraagon]

I always wondered why the params was there and ignored it because it didn't print the object to log. Now I know how to use it. Thanks!

[clonger]

Finally a tip I actually already knew the answer to in advance 😂

[XZeroKPS]

I wouldn't have known this but the IDE started telling me to stop doing this a month ago or so

[ElCerdoBlanco]

Note that when you use the other methods, you will always create the string before passing it to the logger. So all the .toString() calls are evaluated, even if you pass the string to Verbose/Trace or Debug, but only have the Info log level activated. That's why you should definitely prefer the lazy evaluation done by the logger, that checks the active log level before doing something.

[jaswanthmca]

True. We have this issue with high memory usage. Fixing the logger with messagetemplate resolved. Observed significant impact of memory usage too ❤

[RealCheesyBread]

Your logger still has to use memory to do the string interpolation when writing logs to a file. However, this method means you do not do the string interpolation for log lines that are disabled due to your currently configured logging level.

[khalednabilcs]

I used the interprelated but when I checked the logs I didn't get the object name so since then I have been using the template one
Thanks for the deep explanation

[jeffreyepiscopo]

Thank you for reminding me I need to log…

[DoeJohn]

Well …looks like I have a bunch of loggers I need to fix haha.

[allothernameswherealreadytaken]

Thanks for explaining why you should do it this way, since that is something many fail to do

[facundosoler]

Thanks for this ! I think we might be using it wrong at my company as well ! I've shared this !

[adityaranjansahoo]

I use Logger for Displaying Exception Messages...can Also use Print Stack Trace or the Simple getString()

[Denmaverick]

Oh that's what IntelliSense was suggesting all this time haha

[Anequit]

This is really important if you do a LOT of logging

[zabustifu]

I'm used to using the TelemetryClient because it gives me more control than the ILogger when logging into Azure. I used to get warnings in my IDE that the message should not have dynamic parts (it's called "eventName" when you call TrackEvent, so it makes sense that it should be static). So I'm used to putting all the specific data in the custom dimensions, not in the main message (which is just something like "CustomerCreated", and no extra info). Maybe I'm doing it wrong, but it has served me well so far, and makes it easy to create alerting and dashboards.

[terjes]

serilogger has the signature Log.Information(string 👍

[jacobstamm]

Sort of reminds me of Expression<Func<T>> vs Func<T>. Is there some language level feature which makes these string templates different from other strings, or do these Log methods simply have a manual implementation of the functionality? If it’s the latter, does the IDE simply have a hard-coded list of methods it knows use this functionality so it can provide the syntax highlighting of template params?

[kknheyahsshshshd]

Please make an indepth video also how u do filtering in your logging and so on can be also paid I don't mind

[RusWatcher]

Thx, good to know. We have created our own wrappers that use delegates in case there's a listener.

[nithinb]

Dotnet should fix this wrong naming immediately. Such a silly mistake.