How can I keep track of what happens during XAML boot?

Question

I would like to find a way to see what happens during the loading of my XAML. What classes are created, and in what order? What properties are set, what values ​​and in what order? What methods are called (for example, BeginInit, EndInit, etc.), in what order and with what parameters? That kind of thing.

(If anyone is wondering why, because the XAML loader does something magical, that I cannot duplicate the code , and I'm trying to figure out what it is.)

• My first idea: Configure VS for debugging in .NET source code and execute the one-step XAML boot code to see what happens. Unfortunately, the initial step has been spent for several months, and there are no signs of this change.
• My second idea: create my own classes that go down from WPF classes, override OnPropertyChanged, and do Debug.WriteLine. Unfortunately, one of the classes that I want to learn about ( BitmapImage ) is sealed, so I cannot go down with it.

Does anyone have any other ideas on how I could get specific information about what the XAML loader does? Are there any tools (profiler, maybe?) That could give me a call schedule? Is there a way to enable some kind of log in the XAML bootloader? Thoughts / suggestions?

---

Edit: The article related to this has an answer, although their sample code makes each event appear twice. For reference, here's how to make this work in code (no changes to app.config are required). Add these lines before calling InitializeComponent () (or enter both lines in the Immediate window in the debugger):

PresentationTraceSources.Refresh();
PresentationTraceSources.MarkupSource.Switch.Level = SourceLevels.All;

This will cause verbose output to appear in the VS output window, including properties that are magically configured behind the scenes.

Answer 1

system.diagnostics. , . , WPF, . , .