title: Regular Expression Not working in C# Code
body: <p>I'm using this regular expression</p>
  
  <pre><code>^(?=.{0,150}$)\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
  </code></pre>
  
  <p>for validating Email Addresses. when I Enter this Email Address : <code>konstinköpet@gmail.com</code> . It is working using Regular expression validator(it is showing InValidEmail Address), but when validating in C# code it is not working(taking it as validEmail Address) </p>
  
  <pre><code>return System.Text.RegularExpressions.Regex.IsMatch(
      strEmailAddress,
      @"^(?=.{0,150}$)\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*",
      System.Text.RegularExpressions.RegexOptions.IgnoreCase
  );
  </code></pre>