title: Foreign language characters in Regular expression in C#
body: <p>In C# code, I am trying to pass chinese characters: <code>" 中文ABC123"</code>. </p>
  
  <p>When I use alphanumeric in general using <code>"^[a-zA-Z0-9\s]+$"</code>, </p>
  
  <p>it doesn't pass for <code>"中文ABC123"</code> and regex validation fails. </p>
  
  <p>What other expressions do I need to add for C#?</p>