MacOS Mono bundle app - how to get the full path of the application?

Question

Mono

There is Mono - an application from which a monolithic executable file is made (using mkbundle). This file is then placed in a Finder-friendly directory structure and looks and runs like a normal application. The problem is getting inside the application the full path to the installed application.
Standard functions and properties ( Environment.GetCommandLineArgs(), Application.ExecutablePath, Application.StartupPath) do not reflect reality - either they contain only the root as a directory or only the name of the executable file (moreover, the original .exe, not the bundle).
Is there any way I can get what I need?