How to make regular expression for this in c#? [closed]

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I have a expression, i need to validate. I wanna do it using regular expression. Please help.

1. AAsswwww-11233 (First 2 char are static - then any alphabets only - then hyphen - then only digits.

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try

var regex = new Regex(@"^AA[a-zA-Z]+-[0-9]+$");

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@"^AA[A-Za-z]+[-]\d+$"

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