title: Regular expression to allow backslash in C#
body: <p>Can anyone provide me with regex for validating string which only should not allow any special characters except backslash. I tried  </p>
  
  <pre><code>var regexItem = new Regex("^[a-zA-Z0-9\\\ ]*$");
  </code></pre>
  
  <p>But it doesn't seem to work</p>