title: Why is TrimStart not recognised in VisualStudio for ASP.NET?
body: <p>I whant to use TrimStart for my string value like this: <a href="https://stackoverflow.com/questions/2723735/how-to-remove-all-zeros-from-strings-beginning">How to remove all zeros from string&#39;s beginning?</a></p>
  
  <p>But TrimStart syntax is not recognise in VisualStudio. How to corectly generate it?</p>
  
  <p>my code:</p>
  
  <pre><code>string str = parameters.Internal;
  string s = str;
  string no_start_zeros = s.TrimStart('0');
  </code></pre>