[Via Mike Stall’s .NET Debugging Blog]
Felice Pollano is building a debugger that leverages Reflector and MDBG. Check out his screenshot below. I will be watching this for when he releases the binaries for this!
<snip>
This post just to share an idea and a work in progress. Leveraging Reflector and MDBG ( a complete managed debugger provided by Microsoft as a sample ) i'm writing a tool that allow to debug without *any* debug infos and use the Reflector disassembler to provide more readable infos on the code. Very useful if we want to dig inside the framework functions.
I cannot yet post the source and the binary, cause the stuff is very poor until now, but let's have a screenshot:

Please notice that:
- This is not a Reflector AddIn, but a standalone application using Reflector
- The debugging API is used wrapped by MDBG classes
- The actual version need a too extensive uses of manual commands in the shell windows
- Some times I have some deadlock ( this is the reason I cannot yet post the code )
- IL Istruction pointer is sometimes MAPPING_APPROXIMATE ( this is a flag returned by the debugger core itself, not my error ) standing for "I cannot say exactly wich il instruction I'm executing at this IP" ( or at least this is actually my interpretation
- The upper view is IL only, but I guess I will manage to have a mixed one ( Disassembled - IL )
- When a process is attached, all assemblies were loades in the reflector assembly tree
- When a breakpoint is detected, the proper function is automatically showed in the reflector disassembler view and in the IL view.
- Of course, I used Composite UI Application Block to organize the application.
</snip>