VB vs C# is there a auto documenting feature in C#

All the same pCode, but is there any reason for selecting VB or C# when 
starting a new project?
I thought there was some auto documenting feature in C# that is not in VB.

Started this new job in Sept.  Manager wants it in VB.Net.  Tried to tell him 
reasons for going
C#, but didn't push it.  Now the other developer of 4 yrs here wants to push 
C#, and we are
supposed to come up with a justification.

SCENARIO
Manager knows a bit of VB.  Manager + third guy are old COBOL programmers.
Mike and I are to write the bulk of the code, and all the code for the first 
year.

Any ideas for justifying going C# or VB.Net?

Thanks in Advance,

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Elizabeth Gee
Information Architect
http://www.nwtd.com