How to debug into the source code ?

[damonpkuml]

I used the latest WPF source code and executed the following command:
.\build.cmd -pack -ci -configuration Debug -prepareMachine /p:Platform=x64
The NuGet packages were successfully generated.
Then, I created a new console application and referenced the generated NuGet packages.
A newly created WPF window was successfully displayed.

My question is: how can I set breakpoints and step into the WPF source code during debugging?

When I try to open the WPF project in Visual Studio, I encounter many errors, most of which seem to come from the ApiCompat.targets file. For example:
CannotRemoveBaseTypeOrInterface: Type 'System.Windows.Controls.Ribbon.RibbonToggleButton' does not inherit from base type 'System.Windows.Controls.Primitives.ToggleButton' in the implementation but it does in the contract.

[damonpkuml]

#5215
A demo is needed to better understand WPF.

[miloush]

Have you seen https://github.com/dotnet/wpf/blob/main/Documentation/developer-guide.md?

[miloush]

Also in general, you can set breakpoints based on function name, regardless of whether you have source code:

[damonpkuml]

I don't know how to step into wpf,when i have no wpf source code.

[miloush]

You either set a function breakpoint to the method you want to break on, or, you can just Step Into when debugging (provided Just My Code is disabled). You said you have WPF source code, it's in this repo. If the project is set up in a way that it doesn't know where the source code is, the Visual Studio will ask you for a file and you can point it to the one in the repo.