Vs Object Browser cannot view Nested classes

In the past few days, I want to see how winform encapsulates WIN32API. So I tracked the debugging process, for example:

I am concerned with the window process, because this is a callback function. When the local code calls a function in. net, it is implemented using delegate in. net. You can see that the called

System. Windows. Forms. dll! System. Windows. Forms. nativewindow. windowclass. Callback (system. intptr hwnd, int MSG, system. intptr wparam, system. intptr lparam.

As a result, I can view the information about the windowclass class in the vs Object Browser. For example:

If you enter windowclass in the search box, no results are found.

Then I checked it with ildasm and finally found this nested class, as shown below:

Now we have finally found related classes and Methods. Next we can look at how to package WIN32API.