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I am dealing with very complex objects in .NET (in my case a finite element model that can consist of thousands of other objects say a Model instance have a large list of Element instance). I would like to add log feature per Model and its only for showing the log to user, not storing it. A very simple way is to add a Status property of type string to model and write status into it. Also can create a more complex type Status but the thing i want to know what is prettier way to this? is there any built in feature in .NET for this purpose?

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  • The thing i am searching for is well known Trace tool per object, not a global trace tool at System.Diagnostics.Trace. I need to know does anyone know such pre-coded library. – epsi1on Sep 22 '14 at 7:03
  • library recommendations are explicitly off-topic per help center (it's the same here as at Stack Overflow). See meta.programmers.stackexchange.com/questions/6483/… – gnat Sep 22 '14 at 7:05
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You are probably looking for TraceSource, as opposed to its older sibling, Trace.

It works very similarly, except you create instances of TraceSource with different identifiers.

var source = new TraceSource("foo");
source.Listeners.Add(new ConsoleTraceListener());
source.TraceEvent(TraceEventType.Error, 1, "here be dragons");

The instances can be configured in code or through (app/web/machine).config files, though most of that is explained in the MSDN link.

As far as showing it to the user rather than storing it - that is just a matter of attaching the right listener. If a built-in listener type which does what you want does not exist, it is pretty easy to extend TraceListener. For example, in a small test utility, I created one that raised events when messages were written and then wired the events to display them in the system tray.

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