It may not be very fashionable, but when I need to know the inheritance chain while creating some code, I read the MSDN documentation page on the class of interest, and all is there, near the bottom, under Inheritance Hierarchy. And while I'm there, I typically read the entire page, there is always something of interest, most often in the Remarks section.
Example: System.Windows.Forms.TreeNode[^]
Note: The documentation tends to also show derived classes (only those that are part of .NET of course), something the original/alternative code doesn't do.:)
