title: Regular Expression - 2 letters and 2 numbers in C#
body: <p>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.</p>
  
  <p>The first 2 characters must be alphabetic and 2 last caracters must be numbers.</p>
  
  <p>I tried many combinations and I didn't have success. Last one I tried:</p>
  
  <pre><code>if(Regex.IsMatch(myString, "^[A-Za-z]{2}[0-9]{2}")){
  }
  </code></pre>