Regex help with asterisk

I need to validate a string that the second letter could have either an asterisk or a letter.  I tried the following regex pattern "^[A-Za-z]\[a-zA-Z\x2A]\d{2}$".  I am using .Net.  Any suggestions?  The rest of the string starts with a letter then has the letter or asterisk and then with two numbers at the end.  For example, could be AA12 or A*12.

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lampy24Author Commented:
Thanks - I was thrown by trying to use \ with [] thanks again.
Thanks for the question and the points.
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Regular Expressions

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