Regular Expression - 2 letters and 2 numbers in C#

Question

I am trying to develop a regular expression to validate a string that comes to me like: \"TE33\" or \"FR56\" or any sequence respecting 2 letters and 2 numbers.

The

Answer 1

You're missing an ending anchor.

if(Regex.IsMatch(myString, "^[A-Za-z]{2}[0-9]{2}\z")) {
    // ...
}

Here's a demo.

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EDIT: If you can have anything between an initial 2 letters and a final 2 numbers:

if(Regex.IsMatch(myString, @"^[A-Za-z]{2}.*\d{2}\z")) {
    // ...
}

Here's a demo.