title: Regex Latin characters filter and non latin character filer
body: <p>I am developing a program ,where I need to filter words and sentences which are non-Latin character. The problem is, that I found only Latin character words and sentences , but I do not found words and sentences which are mixed with Latin characters and non-Latin characters. For example, "Hello" is Latin letter word, and I can match it using this code:</p>
  
  <pre><code>Match match = Regex.Match(line.Line, @"[^\u0000-\u007F]+", RegexOptions.IgnoreCase);
  
  if (match.Success)
  {
      line.Line = match.Groups[1].Value;
  }
  </code></pre>
  
  <p>But I do not found for example mixed with non-Latin letter word or sentences : "Hellø I am sømthing" .</p>
  
  <p>Also, could somebody explain what is RegexOptions.None or RegexOptions.IgnoreCase and for what they stand for?</p>